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| Size | US | Chest | Waist | Hip |
|---|---|---|---|---|
| XS | 2 | 32 | 24 - 25 | 33 - 34 |
| S | 4 | 34 - 35 | 26 - 27 | 35 - 26 |
| M | 6 | 36 - 37 | 28 - 29 | 38 - 40 |
| L | 8 | 38 - 29 | 30 - 31 | 42 - 44 |
| XL | 10 | 40 - 41 | 32 - 33 | 45 - 47 |
| XXL | 12 | 42 - 43 | 34 - 35 | 48 - 50 |
Le Mans is two weeks away. Here's what makes the world's best endurance racing suits different — and what amateur endurance racers actually need to finish a 24-hour event safely.
FIA 8856-2018, multi-driver fit, heat at hour 14, and the gap between professional Le Mans gear and what amateur endurance racers actually need.
The 24 Hours of Le Mans runs in two weeks. Across the Le Mans Hypercar, LMP2, and LMGT3 classes, every driver climbing into a car at Circuit de la Sarthe will be wearing a homologated FIA 8856-2018 racing suit — typically a $2,500 to $4,500 piece of equipment custom-fitted in Italy, the UK, or Japan. Watch the pit-lane footage on race day and you'll see why: 24-hour racing puts a suit through more thermal cycles, more sweat saturation, and more harness friction in one event than a weekend sprint racer's suit sees in two seasons.
But here's the thing most articles about endurance racing suits get wrong. The Le Mans-spec suit isn't the standard for endurance racing — it's the standard for *professional* endurance racing. The thousands of amateur endurance racers running 24 Hours of Lemons, NASA Endurance, 25 Hours of Thunderhill, World Racing League, ChumpCar, and the Daytona supporting series don't need an FIA 8856-2018 suit. They need an SFI 3.2A/5 suit built for the way *they* actually race. There's a real gap between those two worlds — and that gap is where most amateur endurance racers either over-spend by 4× or under-protect themselves.
This guide walks through both. What the Le Mans pros wear and why, what amateur endurance racers actually need, and how to spec a custom endurance suit that survives a 24-hour event without bankrupting you.
Sprint racing is a series of brutal, short events. Endurance racing is one long, brutal event. The suit goes through things in 24 hours that a sprint suit doesn't see in a year:
A weekend sprint suit will technically pass tech for an endurance race. It just won't be enjoyable to wear by hour 14 — and "not enjoyable" in a race car is "not safe."
There are two parallel standards in serious motor racing:
The two standards are roughly equivalent at SFI 3.2A/5 ≈ FIA 8856-2018 in real-world fire protection. Where they differ is in testing methodology and documentation requirements — FIA suits have stricter manufacturer traceability, SFI suits have stricter periodic recertification rules. If you're running anywhere outside FIA-sanctioned global championships, SFI 3.2A/5 is the practical floor.
For our SFI rating-by-discipline breakdown, see this guide. The endurance section spells out the specific requirements by series.
Walk through a Hypercar or LMP2 paddock and you'll see suits from a small handful of homologated manufacturers — Sparco, OMP, Stand 21, Alpinestars Tech-Air. Every one of them is FIA 8856-2018 certified. What you're paying for at the Le Mans-spec level:
This is genuinely good gear. It's also genuinely overkill for 95% of racers reading this article. If you're not in a series that mandates 8856-2018, you're paying $3,000 extra for documentation overhead and a label.
If you race any of the following, here's what you actually need in a suit:
In every case except IMSA, an SFI 3.2A/5 custom suit built for endurance fits the regs and saves you 3–4× the cost of an FIA 8856-2018 suit.
Most amateur endurance teams run with 3 or 4 drivers per car. Rules don't usually require each driver to have their own suit (helmets and HANS devices are personal — suits less so in non-FIA classes), but in practice each driver should have their own custom-fit suit because:
Team Tip
Spec the whole team's suits with matching graphics and individual driver names. Order them together so the lead times sync. Most amateur endurance teams that look professional started this way — not because they had a sponsorship deal, but because they batched their order with the same maker.
This is the single biggest difference between a "passes tech" suit and a "you can actually finish the race" suit. By hour 14, a driver in the wrong suit is dehydrated, fatigued, and making mistakes that look like driver error but are really equipment failures.
What helps in heat:
Cool-shirt and helmet-cooling systems work with the suit, not instead of it. The suit's job is to not block the cooling system from working.
In sprint racing the pit stop is the engineer's problem. In endurance racing it's the driver's. Your suit needs to come on and off fast, and stay closed once you're strapped in. What matters:
If you're about to order a custom suit for an upcoming endurance event, hand this checklist to your supplier. If they can't deliver every item, find a different supplier:
HS Race Gear's custom endurance suits hit every item on this list, start at $329, and ship worldwide. We've spec'd suits for 24 Hours of Lemons crews, NASA endurance teams, and Daytona supporting-series racers across the US.
Six things we see endurance teams get wrong, in rough order of how often:
Keep going — more racing-suit guides from the HS Race Gear blog.
Which SFI rating each dirt oval body requires, by class. Street stock through winged sprint car, plus what tech actually checks.
SFI 3.2A is tiered and US-focused; FIA 8856-2018 is single pass/fail and international. Why one won't reliably substitute for the other.
The hidden number behind every SFI rating. Why two SFI 3.2A/5 suits can have different TPP scores, and how to find the actual number.
HS Race Gear builds custom SFI 3.2A/5 endurance racing suits with two-layer Nomex®, stretch panels, moisture-wicking liners, and team livery. Built to your measurements. Team pricing at 3+ suits. Free shipping on custom suits.
