Driving Suits Guide for HPDE & Track Days
A driving suit is not required at most HPDE 1-2 events, but becomes necessary — and sensible — as you move into higher run groups and more competitive events. The suit's job is simple: give you enough time to exit the car in a fuel fire. Most driving fires are survivable if you can get out. A quality fire suit buys you the seconds you need.
SFI vs FIA Ratings
Driving suits are certified by two organizations — the SFI Foundation (North American standard) and the FIA (international standard). Both certify suits for fire resistance, but use different test protocols.
| Rating | Layers | Fire Protection | Accepted At |
|---|---|---|---|
| SFI 3.2A/1 | Single | ~3.4 seconds | Most HPDE, GridLife TN |
| SFI 3.2A/5 | Multi | ~19 seconds | SCCA wheel-to-wheel, SCCA TT Club |
| FIA 8856-2018 | Multi | ~12+ seconds | International events, GridLife TA |
| FIA 8856-2000 | Multi | ~8 seconds | Older standard, still accepted at most events |
For HPDE 3 and GridLife Track Nation, an SFI 3.2A/1 single-layer suit is accepted at most events and is the practical entry point. For SCCA Time Trials at Club level and above, SFI 3.2A/5 or FIA 8856-2018 is required.
Single-Layer vs Multi-Layer
Single-layer suits are lighter, cooler, and significantly cheaper than multi-layer suits. They provide less fire protection (about 3–4 seconds vs 19+ seconds) but are appropriate for the vast majority of HPDE and club motorsport use. Unless you're doing wheel-to-wheel racing, a quality single-layer SFI suit is what you want.
Multi-layer suits are hot and heavy — wearing one for a full HPDE day is uncomfortable. Buy multi-layer when your sanctioning body requires it, not before.
Fit and What to Look For
Suit fit is critical for both comfort and safety. A properly fitted suit:
- Has no excess fabric pooling at the wrists, ankles, or torso — loose fabric in a fire is bad
- Allows full arm extension to the steering wheel without the collar riding up
- Has enough inseam length so the suit doesn't ride up when seated
- Closes fully at the neck without choking
Most suit manufacturers publish sizing charts based on height, chest, waist, and inseam. Order one size up if you're between sizes — you can always take in excess material but you can't add it.
Picks by Budget
Suit Care
- Wash inside-out on a delicate/cold cycle with mild detergent
- Never use fabric softener — it coats Nomex fibers and significantly reduces fire resistance
- Air dry; don't put Nomex in a dryer
- Store away from UV light — prolonged sun exposure degrades Nomex
- Inspect for damage before each event: tears, worn patches, or compromised zipper covers reduce protection