Custom Single-Layer Race Suits — SFI 3.2A/1
A custom single-layer race suit is a one-layer, fire-resistant Nomex® driving suit certified to the SFI Foundation’s 3.2A/1 level — about 3 seconds of fire protection in the lightest, coolest and most affordable build we make — patterned to your exact measurements and design.
- SFI 3.2A/1 certified single-layer Nomex®
- Lightest & most breathable suit · ideal for karting
- Free design mockup in ~3 hours · 3.5-week delivery
How it looks on real racers
Sean Genson
Ryan Claeys
Ryan Denher
Nick Provost
Mike Wood
Jacob Julson
Eric Andreen
The Kelsey FamilySFI 3.2A/1 Certified
Lab-tested single-layer Nomex®
Lightest Build
One layer · most breathable
From $349
Our most affordable suit
3.5-Week Delivery
Free USA shipping
What is a single-layer (SFI 3.2A/1) race suit?
A single-layer race suit is a driving suit built from one layer of flame-resistant Nomex® meta-aramid, independently certified by the SFI Foundation to the 3.2A standard at the “/1” thermal level. The number is the TPP rating — roughly the seconds of protection before a second-degree burn — so a /1 gives about 3 seconds, versus ~10 for a double-layer /5.
With only one Nomex® layer, it’s the lightest, coolest and most affordable certified suit there is — the go-to for karting, entry-level racing, autocross and track days where a /1 is legal. Most rulebooks that allow it also require FR underwear underneath.
Single vs double layer →
What makes it single-layer
- One Layer of Certified Nomex®
A single layer of flame-resistant meta-aramid — the build that earns the SFI 3.2A/1 rating and roughly 3 seconds of fire protection.
- Lightest, Coolest Build
One layer means the least weight and the most airflow of any suit we make — a real difference on hot track days and long karting heats.
- Independently SFI 3.2A/1 Certified
Tested and certified by the SFI Foundation — the rating accepted for karting, autocross and many entry-level and track-day classes.
- Pairs With FR Underwear
Because it’s a single layer, most /1-legal rulebooks require flame-resistant underwear underneath — an easy way to add thermal protection.
- 100% Custom Design
Your colors, panels, sponsor logos and embroidered name — designed with you, free, with unlimited revisions before you pay.
- Our Most Affordable Suit
Single-layer starts at $349 — the lowest-cost certified suit FervoGear builds, with the same hand-finishing as our pricier suits.
Design mockups & colorways
Build a suit no one else has — start from a proven design, make it yours, and approve your free mockup before you pay.
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SFI 3.2A protection scale
Need more than a /1 for your series? See our custom SFI-5 race suits →
Real flame. Real Nomex®. It chars, it doesn’t burn.
We held an open flame to the same flame-resistant Nomex® we use in every single-layer suit. It didn’t ignite, melt or drip — that’s the ~3 seconds the “/1” rating buys you, and the reason a single layer still beats any non-FR clothing.
- Won’t ignite — flame-resistant at the fiber level
- Won’t melt — chars in place to prevent burn-through
- SFI 3.2A certified, independently tested
How much is a custom single-layer suit?
Single-Layer SFI 3.2A/1
- One layer of certified Nomex®
- ~3 seconds of fire protection
- Lightest, coolest build we make
Single-Layer + Free Gloves
- Single-layer SFI 3.2A/1 Nomex®
- Free matching gloves ($150)
- 100% custom colors & sponsors
Single-Layer Two-Piece
- Separate jacket and pants
- Easy on/off for track days
- Fully custom, made to measure
See the full breakdown on our custom race suit pricing →
Your custom suit in 5 simple steps
01Submit your design
Tell us your colors, logos and suit type — or start from a design you love. No card required, takes ~30 seconds.
Start your design — it’s freeCustom suits we've built
The lightest suit you can race in — still certified
A single Nomex® layer means the least weight and the most airflow of any suit we make. On a hot karting day or a summer track day, that breathability is the difference between focusing on your line and fighting the heat — without giving up SFI 3.2A/1 certification.
Because it’s one layer, total thermal protection is about 3 seconds, so most /1-legal rulebooks also require FR underwear underneath. Cut to your exact measurements with 360° underarm gussets, the suit moves with you through every heat and session.
What is Nomex® →
Why FervoGear
Pro-grade protection and a head-turning custom design — without the big-brand price or the runaround.
$300–$500 Less
The same pro-grade custom suit for $300–$500 below the big brands — no middleman markup, ever.
Same Quality & Craftsmanship
Identical Nomex®, SFI certification and hand-finishing as suits that cost far more.
Top-Notch Customer Support
Real people, fast answers — from your first design sketch to the final stitch.
Updated Every Step
Design, production, shipping — we keep you in the loop the whole way. No black box.
Robust After-Sale Support
A fit or finish issue down the road? We make it right, fast — we stand behind every suit.
Single-layer (SFI-1) vs double-layer (SFI-5)
| Feature | SFI 3.2A/1 | SFI 3.2A/5 |
|---|---|---|
| Nomex® layers | Single (1) | Double (2) |
| Fire protection (TPP) | ~3 seconds | ~10 seconds |
| SFI rating | 3.2A/1 | 3.2A/5 |
| Weight & airflow | Lightest, coolest | Heavier, warmer |
| FR underwear required | Usually yes | No |
| Starting price | $349 | $799 |
| Best for | Karting · entry · track days | Most sanctioned auto racing |
Not sure what your series allows? SFI ratings explained →
Cut to your exact body
Every single-layer suit is patterned to your measurements — chest, waist, hips, height, arm length and inseam — for a true racing fit, in men’s, women’s and youth.
How to measure for a race suit →What customers say about us
I'm next-level PICKY. My first custom suit was a K1 suit and it sucked — stitching fell out, fit terribly, came back from alterations just as bad. Then I heard about FervoGear. Skeptical at first, but their designs were great and they're MADE IN AMERICA. We went all in and ordered four 3-layer suits — they all came out awesome. Super comfortable.
FervoGear's suits are hands down some of the best in the industry. We constantly get compliments on how sharp they look — people assume they must have cost thousands of dollars, yet they're surprisingly affordable. We've put them through intense conditions, including a few fires in the race car, and they still look brand new.
The entire process from start to finish was incredibly smooth. I sent over some basic design ideas and logos, and their design team created an amazing proof within 24 hours. They were happy to make several small adjustments to get everything perfect. The suit arrived right on schedule and the quality is outstanding!
FervoGear created a custom race suit for me and it has been an incredible experience. They delivered a perfectly fitting suit and went above and beyond by including free Nomex® gloves. The craftsmanship and attention to detail were outstanding. Even more impressive — I had it just 3.5 weeks after ordering, with free shipping.
We love our one-piece race suit. The quality and looks were exactly what we were looking for — we ended up ordering a two-piece suit too. Thank you so much!
I ordered a custom full suit and realized too late that I also needed a sponsor logo for compliance with my team's agreements. The team was super quick to help and got it all sorted for me. Really happy with the service and will order again.
Single-layer suit questions
What is an SFI 3.2A/1 race suit?
How much fire protection does a single-layer suit give?
Who should buy a single-layer race suit?
How much does a custom single-layer race suit cost?
Do I need FR underwear with a single-layer suit?
Is the suit really custom and how long does it take?
Design your custom single-layer suit today
See your exact suit in ~3 hours. Built in 3.5 weeks, certified to SFI 3.2A/1, from $349.