Engineering Radiation Suit Tutorial – Required Materials

Engineering radiation suit tutorial - Star Trek Costume Guide

This a “master” list of required materials and supplies needed to make (nearly) every component of every uniform style.

Unless you plan to make multiple costumes in multiple styles, you probably won’t need everything on this list.

For your shopping convenience, I’ve categorized this list by product type (e.g. fabric, sewing notions, hardware, paint, glue, etc.) and I’ll briefly mention what each item is used for on the finished costume.

In the subsequent tutorial we’ll generally be focusing on one specific component/area of the costume at a time, and during each section, I’ll again mention the materials required for the individual element of our focus.

I’ll also be mentioning possible alternative options as we go, and what I believe their pros and cons to be (e.g. “option A” looks best but “option B” is cheaper).

And finally, I have some suggestions for making this costume on a tighter budget. The majority of the required materials for this costume are inexpensive, but (as you’ll see) there are a great many of them.

But first, the list itself!

FABRICS and CORDING

  • “Cream” wool gabardine = 5 yards

This is for the jumpsuit body, as well as the custom-made piping on the accents, gloves, and boots. 

As a more budget-friendly alternative, I suggest using cotton bull denim.

(If you want to make the orange variant, obviously use orange fabric instead.)

Fabric - denim, JoAnn
  • Off-white cotton muslin = 6 yards

This is for the jumpsuit body underlining (“flat-lining”), and the backing for some of the quilted elements.

Muslin
  • “Cream” knit fabric = 1 yard

This is for the “chest circles” on the jumpsuit body, so the two fabric colors should match as closely as possible. I recommend a matte (not shiny) cotton or rayon knit.

You can also use this fabric for the custom-made piping on some of the jumpsuit accents.

Fabric - cream knit
  • Silver ironing board cover fabric = 1 yard

This is for the TWOK-era thigh, left sleeve, and glove panel assemblies.

Engineering radiation suit tutorial - Star Trek Costume Guide
  • Gold wool gabardine = ¼ yard

This is for the division-colored shoulder tabs and sleeve band on the TWOK-era costumes. Both officers/enlisted personnel and trainees wore gold shoulder tabs.

As a more budget-friendly alternative, I suggest using cotton twill.

Engineering radiation suit tutorial - Star Trek Costume Guide
  • Red wool gabardine = ¼ yard

This is for the TMP-era shoulder tabs and sleeve band on the TWOK-era trainee costumes (see the bottom example to the right).

As a more budget-friendly alternative, I again suggest using cotton twill.

Engineering radiation suit tutorial - Star Trek Costume Guide
  • Black felt = ¼ yard

This is for the base layer on the shoulder tabs and sleeve band, as well as the protective flap on the TWOK-era officer/enlisted collars.

It can also be used to back the TWOK-era thigh, left sleeve, and glove panel assemblies, although I’d suggest increasing your purchase to ½ yard.

Engineering radiation suit tutorial - Star Trek Costume Guide
  • Off-white felt = ⅛ yard

This is for the back of the hip reflector box, as well as the backing for the left sleeve rank amount.

It can also be used to back the TWOK-era thigh, left sleeve, and glove panel assemblies, although I’d suggest increasing your purchase to ½ yard.

Off-white felt
  • Black ¼” or 6mm neoprene = 14” minimum width, 18” minimum length

This is for the TMP and TWOK-era officer/enlisted collars.

As of the writing of this tutorial, there are many suppliers of neoprene sheets on eBay, which is where I purchased mine.

The sheets are generally predetermined sizes, so just be sure to choose one wide and long enough for your collar, plus several inches for the strips.

Black neoprene
  • Lightweight black spandex = ¼ yard

This is for the band of neckline piping on the TWOK-era officer/enlisted collars.

Engineering radiation suit tutorial - Star Trek Costume Guide
  • “Fire red” knit fabric = 1 yard

This is for the TWOK-era trainee collar.

I’m not sure exactly what fabric the screen-used trainee collars were made with, only that it was a knit fabric instead of neoprene.

I suggest using a heavy, matte knit fabric. (I used a cotton knit fabric and custom-dyed it orange-y “flame red.”)

Fabric - rib knit
  • Fusible interfacing = 1 yard

For the TWOK-era trainee collars, I suggest stabilizing your knit fabric with a lightweight woven fusible interfacing.

Fusible interfacing - white
  • Heavy French canvas = 1 yard

This is for the back of the thigh and left sleeve panel assemblies.

  • Heavy clear vinyl = ¼ yard

I used this as a cover for my replica hip reflector box, as well as covers on the TMP-style thigh and left sleeve panel assemblies.

I suggest using thick, heavy vinyl; 22-gauge was the heaviest available at my local JoAnn, but I think something even heavier might work better.

Clear vinyl
  • Black mesh fabric/screen = ⅛ yard

This is for the “bullseye” assembly.

Ideally, I suggest using one with a thick circular pattern like the originals, but in lieu of that, here is the one from my local JoAnn that I used:

Fabric - door window mesh
  • 3/16” piping cord = 1 ½ yards

This is for the two lengths of custom piping along the left sleeve band.

Engineering radiation suit tutorial - Star Trek Costume Guide
  • ¼” piping cord = 4 yards

This is for the custom piping around the hip reflector box, thigh panel assemblies, and left sleeve panel assembly.

Sometimes the piping on the screen-used engineering radiation suit I examined appeared to be 5/16” wide, so feel free to use a slightly wider cord if you prefer.

Engineering radiation suit tutorial - Star Trek Costume Guide
  • ½” upholstery piping cord = 2 yards

This is for the band of piping around the neck of the TWOK-era collars.

Upholstery cord half inch
  • ¾” upholstery piping cord = 4 yards

This is for the three bands of tubing on each jumpsuit sleeve, along the opening of each glove, and the circular accent on the side of each boot.

I’m not sure what was used on the screen-used costumes, but upholstery piping achieves a similar effect.

Upholstery cord 0.75 inch
  • ⅞” upholstery piping cord = 4 yards (men’s version)
    or 1 yard (women’s version)

This is for the three circles of tubing on the chest of the men’s jumpsuit, or the single circle of tubing on the women’s jumpsuit. 

I’m not sure what was used on the screen-used costumes, but upholstery piping achieves a similar effect.

Upholstery cord 1 inch
  • 1” upholstery piping cord = 6 yards

This is for the three bands of tubing on the waist of the jumpsuit, as well as the two bands of piping on the top of each boot.

I’m not sure what was used on the screen-used costumes, but upholstery piping achieves a similar effect.

Upholstery cord 1 inch
  • High-loft batting = ¼ yard (officer enlisted)
    or 1 yard (trainee)

This is for the lower back quilted rectangle on the jumpsuit, as well as for the flared channels on the trainee collar.

High loft batting 2
  • Thick foam interfacing = ¼ yard

I wasn’t entirely satisfied with the trainee collar replica quilted only with the high-loft batting, so I bolstered up the quilted channels afterward with a bit of foam.

Should you wish to duplicate the process, here is the foam interfacing that I used:

Fabric - foam (trainee collar)
  • Red felt = ⅛ yard

This is for the protective flap on the TWOK-era trainee collars.

Red felt

NOTIONS

  • 2 spools of off-white thread

This is for the jumpsuit, as well as the glove and boot accents.

There is some visible topstitching on the jumpsuit, so I suggest matching your jumpsuit fabric as closely as possible.

(If you’re making the orange variant, use orange thread instead.)

Off-white thread - Star Trek Costume Guide
  • 1 spool of black thread

This is for the neckline piping on the TWOK-era officer/enlisted collar.

Black thread - Star Trek Costume Guide
  • 1 spool of red thread

This is for the TMP shoulder tabs, as well as the TWOK-era trainee collar and left sleeve band.

Fire red thread - Star Trek Costume Guide
  • 1 spool of gold thread

This is for the TWOK-era shoulder tabs and officer/enlisted left sleeve band.

  • 1 spool of gray thread

This is for the TWOK-era thigh, left sleeve and glove panel assemblies. It should closely match your ironing table fabric.

Gray thread - Star Trek Costume Guide
  • Off-white serger thread

This is for the interior of the jumpsuit, and optional use on the glove and boot attachments.

Ivory serger thread - Star Trek Costume Guide
  • Gray serger thread

This is for the TWOK-era thigh, left sleeve and glove panel assemblies. It should closely match your ironing table fabric.

Gray serger thread - Star Trek Costume Guide
  • Black serger thread

This is for the TWOK-era thigh, left sleeve and glove panel assemblies.

Black serger thread - Star Trek Costume Guide
  • Black serger thread

This is for the TWOK-era thigh, left sleeve and glove panel assemblies.

Black serger thread - Star Trek Costume Guide
  • 1” black hook-and-loop tape = ½ yard

This is for the closure on the officer/enlisted collars.

  • 1” red hook-and-loop tape = ½ yard

This is for the closure on the TWOK-era trainee collars.

  • 1” white hook-and-loop tape = 3 yards

This is for the back jumpsuit closure, as well as to secure the collar to the upper front of the jumpsuit.

  • Black ⅞” grosgrain ribbon = ¼ yard

This is for the closure on the officer/enlisted collars.

  • Red ⅞” grosgrain ribbon = ¼ yard

This is for the closure on the TWOK-era trainee collars.

  • 11” off-white brass zipper

This is for the hidden front fly on the men’s jumpsuit.

  • Two silver hooks-and-eyes (ideally size 3)

These are to supplement the hidden back closure on the jumpsuit.

  • Two silver snaps (ideally size 3)

These are to supplement the hidden back closure on the jumpsuit.

  • One black snap (ideally size 1)

This is to supplement the hidden closure on the TWOK-era officer/enlisted collar.

  • ⅝” white elastic = 1 yard

This is for the “stirrups” on the lower pant legs of the jumpsuit.

  • Two ⅜” silver screw back dome rivets

These are to accent the small plastic “closures” on the TWOK-era collars.

You’ll probably also need some longer screws and washers on the underside of the neckline piping, which I’ll mention again in the corresponding section of the tutorial.

  • Fabric temporary spray adhesive

This isn’t strictly necessary, but I do find it very helpful for quilting components of this costume like the lower back rectangle and TWOK-era trainee collar.

HARDWARE

  • Two clear plastic mirror mounts

These are for the closures on the TWOK-era collars.

Ideally each half/side of the mount should be ⅜” (10mm) square, and the thicker side should be about ¼” tall.

Mirror mounting clips - Star Trek Costume Guide
  • Automotive grease fitting

This is for the circular left chest accent on the TWOK-era jumpsuits.

You may wish to fasten your fitting with a washer and nut, which I’ll mention again in the corresponding section of the tutorial.

Automotive grease fitting - Star Trek Costume Guide
  • Bi-folding door slide guide (N-6539)

This is for the accent on the TWOK-era left sleeve panel assembly.

  • ¼” black drainage tubing OR micro fuel line

This is for the thin tubing on the TWOK-era officer/enlisted thigh, left sleeve, and glove panel assemblies.

  • ½” black drainage tubing OR fuel line

This is for the thick tubing on the TWOK-era officer/enlisted thigh panel assemblies.

  • ¼” clear drainage tubing OR micro fuel line

This is for the tubing on the front of the TWOK-era trainee collars.

  • Four ¼” tubing or shelf end caps

I used these on the ends of my TWOK-era trainee collar tubing assemblies.

  • ¼” red drainage tubing OR micro fuel line

This is for the thin tubing on the TWOK-era trainee thigh, left sleeve, and glove panel assemblies.

TWOK engineering radiation suit analysis - Star Trek Costume Guide
  • ½” red drainage tubing OR fuel line

This is for the thick tubing on the TWOK-era trainee thigh panel assemblies.

TWOK engineering radiation suit analysis - Star Trek Costume Guide
  • Metal washer

This is for the circular silver accent on the “bullseye” assembly and should be 1” in diameter, ⅛” thick, with a ¾” hole.

This is for the circular silver accent on the “bullseye” assembly and should be 1” in diameter, ⅛” thick, with a ¾” hole.

The closest thing I found to those dimensions at my local hardware store was a “machine bushing,” but it was too flat, so you might consider stacking several of them. For the demonstration assembly in this tutorial, I just made mine out of wood and painted it silver – but more on that later.

CRAFT WOOD and FOAM

I’m not sure exactly what some of the screen-used components were made with, so I used craft wood.

Standard craft/EVA foam is cheaper and can work for some of the elements, too.

As you might recall from my screen-used engineering radiation suit examination, I believe the left hip accent to have been a reflector box (like one might see on a tractor trailer), but if so, I was unable to find the specific model. In lieu of one of the originals, I made a replica out of wood as well.

Craft wood - Star Trek Costume Guide

For the aforementioned replica hip reflector box, I used a piece of wood 2” wide and ⅛” thick for the base.

I used a piece of wood ¾” wide and ⅛” thick for the “walls.”

I used a piece of wood ⅝” wide and ¼” thick for the interior “strips.”

Craft wood - Star Trek Costume Guide

As you might also recall from my screen-used engineering radiation suit examination, the original Edelrid climbing buckles used for the TWOK-era jumpsuits seem to no longer be available, but you have several options for replicating them.

Sell Geek recently began offering replica metal buckles.

Eric Olds (aka “Felgacarb”) also offers 3D printed buckles on Shapeways.

As of the writing of this tutorial, I haven’t used either of these or seen them in-person, but they look fantastic.

However, they are somewhat expensive (depending on your project budget)), so if they aren’t viable options for you at the moment, you might consider making your own replicas out of wood or craft foam. (It’s easy to replace the buckles later, if you ever decide you want to upgrade to the 3D printed ones when you have the means to do so.)

When shaped, sanded, and painted well, wood looks much better than craft foam, but obviously you need the appropriate tools (I primarily used a rotary saw and sanding bit) to work with it.

I used a beam of craft wood 3” wide and ⅜” thick.

Foam sheets are cheaper, plus both faster and easier to work with … but in my opinion the final result doesn’t look nearly as good.

Should you decide to use foam, I suggest using some at least 6mm thick. 

Craft foam and wood - Star Trek Costume Guide

For both TMP-era buckle styles, though, the 6mm craft foam works great.

For the circular left chest accent and “bullseye” layers, you’ll need some thin wood, metal, or foam circles.

I recommend using wood, but any of them will work – especially for the “bullseye” layers.

The left chest accent is 1 ¾” in diameter.

The “bullseye” base layer is 2 ¼” in diameter, and the second layer is 1 ⅜” in diameter.

My local JoAnn carries this packaged selection of assorted craft wood circles, including a few which were exactly 1 ¾” in diameter (see right).

Unfortunately, it doesn’t include the two other sizes (2 ¼” and 1 ⅜”), but it does include a couple which are slightly larger (2 ½” and 1 ½”) and can be sanded down to size.

Craft wood circles - Star Trek Costume Guide

You’ll probably also want a couple thin wooden dowels.

Wooden dowels - Star Trek Costume Guide

I used a ⅛” circular dowel to form the plastic “closure” on the TWOK-era collars.

Engineering radiation suit tutorial - Star Trek Costume Guide

I also used a ¼” circular dowel for the center rod of the “bullseye” assembly.

Engineering radiation suit tutorial - Star Trek Costume Guide

For the TWOK-era trainee collars, I used a ¼” rectangular dowel for the little accents at the bottom of the tubing assemblies.

Engineering radiation suit tutorial - Star Trek Costume Guide

For the TMP-style thigh and left sleeve panels, I think 6mm craft/EVA foam is a perfect option.

It’s cheap, easy, and looks great to me!

PAINTS

For all of the various painted elements, I used inexpensive retail acrylic paints and used a paintbrush.

(Airbrushing would almost certainly produce superior results, but my airbrush was packed away at the time and I’m a novice at airbrushing, anyway. I also wanted to demonstrate the results one could achieve with limited tools and means.)

The screen-used circular left chest accent appears to have been steel, but I didn’t find a metallic steel paint color I liked, so I used a mix of FolkArt metallic “Gunmetal Gray” and FolkArt metallic “Silver Sterling.”

Engineering radiation suit tutorial - Star Trek Costume Guide
Paints combined 1 - Star Trek Costume Guide

For the “bullseye” assembly, there are seven different paint colors:

Paints combined 2 - Star Trek Costume Guide

For the replica Edelrid buckles, I applied a couple base coats of the aforementioned FolkArt metallic “Gunmetal Gray”, then a couple more coats of DecoArt metallic “Shimmering Silver.”

(There are probably metallic silver rattle cans that produce faster, easier, and superior results, but I haven’t tried any.)

Paints combined 3 - Star Trek Costume Guide

For the replica TMP buckles on craft foam, I only used the aforementioned FolkArt metallic “Gunmetal Gray.”

Engineering radiation suit tutorial - Star Trek Costume Guide

For the replica hip reflector box, I primarily used the aforementioned Top Notch metallic “Pearl,” although I did paint the base layer with DecoArt metallic “Shimmering Silver” just to give it some contrast.

I also used a fine-tip metallic silver Sharpie to add some subtle detailing.

Paints combined 4 - Star Trek Costume Guide

For the gloves (and probably the boots), you’ll want an off-white spray paint that’s a close color match to your fabric.

I used Krylon COLORmaxx “Satin Ivory,” which is a convenient paint + primer in one.

Alternatively, if you’re making your costume bleached white (as opposed to off-white), I used Rust-oleum Painter’s Touch Ultra Cover “Flat White,” which is also a convenient paint + primer in one.

GLUES

  • E6000 glue, clear

This is used on multiple components of the costume: the “bullseye” assembly, the fabric loops attaching the buckles to the jumpsuit, the hip reflector box, attaching the French canvas to the back of the thigh and left sleeve panels, the gloves, and the boots.

  • E6000 PLUS glue, clear (optional)

If you have sensitive olfactory sense and/or find sharp chemical smells objectionable, E6000 does make a low-odor version of their glue that may be more to your liking.

However, the tubes are smaller and more expensive, so I suggest getting at least two.

  • E6000 glue, black

This is for the TMP and TWOK-era officer/enlisted collars.

Ideally, the glue will never be seen on the outside of the collar, so you can theoretically use the aforementioned clear glue … but I prefer to use black, just in case.

  • E6000 spray glue, clear

This is used to bond the black mesh to the wood or foam layers of the “bullseye” assembly.

I also suggest using it to bond the clear vinyl to the TMP-era thigh and left sleeve panels.

  • Gorilla Wood Glue (optional)

E6000 is allegedly effective on wood, but I haven’t actually tried it.

For the “bullseye” assembly and hip reflector box, I used Gorilla Wood Glue because it’s specifically intended for wood, and I’d used it in the past with good experiences.

OTHER STUFF

  • TMP division patch (red or yellow)

For the TMP-style uniforms, you’ll want an engineering red patch.

As you might recall from my screen-used engineering radiation suit examination, I believe the TMP yellow patches were repurposed for the TWOK-era radiation suits, to complement the updated gold shoulder tabs and sleeve band.

The TMP yellow patch from “poptoys” on eBay is a terrific match to the screen-used:

Poptoys TMP sleeve patch - Star Trek Costume Guide

As of the writing of this tutorial, I haven’t compared their TMP red patch to a screen-used so I can’t attest to its accuracy, but it does look great to me in-person.

  • TWOK-era rank insignia and “pips and squeaks” of your choice

TWOK rank, pips, and squeaks - Star Trek Costume Guide
  • TWOK-era rank insignia and “pips and squeaks” of your choice

As you might also recall from my screen-used engineering radiation suit examination, the screen-used gloves were Aris Softan Leather, which seem to no longer be made.

However, at least one pair of vintage gloves has turned up on eBay … which I snagged for one of my demonstration uniforms! 🙂

Women's Aris Softan gloves - Star Trek Costume Guide

In lieu of the vintage Aris gloves, almost any poofy gloves should work fine, within reason. And if they’re already white or off-white, then even better!

For my personal gloves (and demonstration purposes), I used a spare pair of black ski gloves I already had stored away and weren’t good for much else anyway.

Once your gloves are painted and the custom accents are added, they should absolutely look the part!

  • Boots

The screen-used boots appear to have either been retail boots with every square inch covered with off-white cavalry twill, or they were actually custom-made on top of a retail sole.

In either case, some moderate Google-ing indicates that neither the boots or soles appear to be available anymore.

As someone who’s not at all an expert in footwear – as a wearer, or as a costumer – I believe the most viable option to be to alter an existing pair of boots that you already know fit you well and you don’t mind “sacrificing.”

As with the gloves, once you paint them and add a couple custom accents, they should look great with the finished costume. 🙂

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