Best Racing Suits

SFI 3.2A ratings: what /1, /5 and /15 mean

SFI Spec 3.2A covers driver suits. SFI classes a suit by a TPP (thermal protective performance) test on its fabric, run to SFI Technical Bulletin 3.2. The number after the slash is a grade, and each grade has a minimum heat figure in calories per square centimetre. SFI's Table 1 lists: /1 at least 6, /3 at least 14, /5 at least 19, /10 at least 38, /15 at least 60, /20 at least 80, /25 at least 100 and /30 at least 120.

The grade belongs to the fabric, not the layer count. SFI says a suit's rating is based on the thermal protection of the material regardless of the number of layers, and that underwear is not counted in the rating. A suit at /5 or higher also has to pass a multiple-layer shrinkage test: total shrinkage of 10 percent or less, and no more than 20 percent consumed by weight. That is why a /1 suit can be a single layer of treated cotton and a /5 suit is usually two layers or more. Some suits reach /5 in one layer: Competition Motorsport lists the Sparco Victory 3.0 as single-layer SFI 3.2A/5 and FIA 8856-2018, though only a handful of sizes were in stock when we checked.

SFI says certification is made by the manufacturer. The foundation states that products are not certified, endorsed or approved by SFI under the program. The suit must carry SFI's conformance patch, sewn to the left sleeve between the wrist and the shoulder (or on the back just below the collar if there is no room), plus a maker's label showing the date of manufacture. A rating describes what the fabric was tested to. It does not promise any result in a real fire.

SFI Spec 3.4, Advanced Driver Suits, is a separate specification with its own grades. It adds a flammability test of the full layup with applied graphics such as embroidery and patches. The Alpinestars GP Pro Comp v2 on this page is rated 3.4/5.

FIA 8856-2018: what the label means

FIA Standard 8856-2018 covers overalls, underwear, cooling garments, socks, shoes, balaclavas, gloves and rain overgarments. Demon Tweeks, a UK racewear seller, summarises it this way: overalls must give at least 12 seconds of heat transmission protection, underwear, socks and balaclavas at least 5 seconds, and shoes 11 seconds. Gloves are longer, socks reach the knee and shoes are higher than under the older 8856-2000 standard. The FIA raised glove heat protection in a June 2022 update and added touchscreen glove designs. In December 2025 it updated the standard again for new cooling garments and overgarments.

Demon Tweeks also reports that 8856-2018 is the first racewear standard with an expiry date on the label, set at 10 years from manufacture, and that it becomes mandatory for all FIA-sanctioned events from 1 January 2029. The FIA's own Technical List 74 says the label on the product is what governs validity. Its columns show the last date a model may be manufactured and the latest possible date on a label.

Demon Tweeks also says the expiry only matters for FIA events and that Motorsport UK meetings keep allowing these suits after it. Treat that as a retailer's statement and check the current Motorsport UK Yearbook. In Australia, Motorsport Australia's 2026 Schedule D sets the apparel minimums by type of competition. It accepts SFI 3.2A/1 or better for overalls at some levels and requires FIA-labelled items at others.

Do you need a fire suit? What organisers say

For most car track days the answer is no. Organisers set their own gear rules, and they differ, so read your organiser's current rulebook before you buy anything.

NASA Mid-Atlantic's HPDE page asks for a long sleeve shirt and pants (it says cotton is great) and a helmet. NASA's Club Codes and Regulations section 5.6, as quoted by NASA Speed News, requires at least a T-shirt, short or long pants and shoes with no open toes. Track Night in America asks for a certified helmet and closed-toe shoes, and says some tracks require long sleeves and pants. Hooked on Driving requires long pants for drivers and guests in hot pit lane, and requires a Snell SA helmet, and we found no suit rule on its pages. Chin Track Days says driving suits are not required in its non-competition format, and that drivers in fully competition-prepared cars will want the full fire-resistant suit they are used to.

Racing changes the answer. The SCCA's Race Experience rules ask for a suit covering the body from neck to ankles and wrists that bears an SFI 3.2A/1, SFI 3.4 or higher, FIA 1986 or FIA 8856-2000 label, plus fire-resistant socks, gloves and shoes. SCCA makes fire-resistant underwear optional with an SFI 3.2A/5 or higher suit. We could not open NASA's national Club Codes and Regulations, so we cannot quote its time trial or wheel-to-wheel suit rules. Check them before you enter.

In the UK, a search extract of the Motorsport UK 2026 National Competition Rules lists FIA 8856-2018 or 8856-2000 overalls for racing and add the FIA 1986 standard for sprints and hill climbs. Other events can also accept BS6249, EN533 or ISO 14116 garments. We could not open that page ourselves, so confirm the wording in the current Yearbook. UK track day operators set their own rules.

Underwear, socks and the rest of the kit

SFI does not rate underwear as part of the suit. Its separate Spec 3.3 covers underclothing, hoods, socks, shoes, gloves and other accessories. Underclothing must run from the neck to the ankles and wrists and be snug at the neck, ankles and wrists, with a minimum TPP of 6.0 cal/cm2. Demon Tweeks lists 5 seconds of heat transmission as the FIA 8856-2018 minimum for underwear.

Where underwear is required depends on the suit label. SCCA says it is optional with FIA 8856-2000 suits or SFI 3.2A/5 and above, and required with the lower-rated suits it accepts. SCCA's requirement applies, for example, to a /1 suit.

Gloves and shoes have their own pages: see the racing gloves and racing shoes guides. A head and neck restraint and a helmet are separate purchases with their own standards.

Sizing and fit

Most suits on this page use European sizing. Alpinestars publishes chest, waist, hip, height and inseam for each size. Size 52, for example, lists a chest of 40 1/8 to 41 3/4 inches, a waist of 34 5/8 to 36 1/4 inches, and a height of 5 ft 11 in to 6 ft. Measure yourself and compare against the maker's chart rather than your street size.

Pegasus describes the Alpinestars Atom as cut more relaxed than most European suits and the Knoxville as a more generous cut. Fit varies by brand and model. Boot-cut legs hide the ankle cuff and slip over shoes, while standard cuffs fit tighter. Try the suit on, sit in the car seat if you can, and check that you can reach the pedals and wheel without the fabric binding. A suit that bunches or pulls is a poor fit, and an oversized one can gap at the collar. SFI requires a collar at least 2 inches high at the back of the neck and 1 3/8 inches at the front.

Washing, care, patches and replacement

Follow the care label on your suit. SFI's sample label for accessories reads 'Gentle wash only'. Retailers' care guides, including GPX Store and Pro-Racing.nl, agree on the basics: cold or 30 degree water, a mild detergent without bleach, no fabric softener, no tumble dryer, and drying in the shade. Pegasus sells Molecule Labs Wash Formula for Nomex and says it removes contaminants that can degrade fabric performance. Oil, fuel and dirt are the things to wash out.

Be careful with patches. SFI 3.2A says embroidered logos are permitted and do not inadvertently affect the rating of the garment, but patches and thread are a separate question. Motorsport Australia's 2026 Schedule D requires flame-resistant backing and thread for badges on FIA-label garments, sewn only to the outer layer. Ask the manufacturer or a suit shop to add them.

On replacement: SFI says suits at 3.2A/10 or higher must be inspected by the certifying maker every five years, and a new label shows the year of inspection. SFI's spec list shows no recertification period for /1, /3 and /5 suits. FIA 8856-2018 labels carry their own date. Demon Tweeks also warns that heavily used suits can thin from washing, sweat, fuel and oil, and says to replace worn gear. Damaged seams, thin patches or holes are reasons to stop using a suit whatever its label says.