OMP First calf length socks, homologated to FIA 8856-2018. Part number IAA-762.
The calf length is the specification, not a style choice. FIA requirements set a minimum sock height, and these exceed the 25cm minimum, which is what makes them approved where an ankle sock is not. If your regulations call for FIA underwear, the socks are part of that and a scrutineer can and does check.
Soft fireproof Nomex in the traditional natural cream, or ecru, colour, or in black or white.
Why they matter
Your ankle is one of the few places where there is nothing between your skin and the outside of a boot except a sock. In a fire, an ordinary cotton or synthetic sock is either fuel or something that melts, and neither is what you want against your ankle. That is the whole reason approved socks exist.
They are also the cheapest single part of an approved kit, and the one most often forgotten until scrutineering.
The First range
OMP’s entry level line, covering suit, gloves, boots, balaclava, top, bottoms and socks, all to 8856-2018. A complete approved set from one range, at clubman prices.
Sizes
XS at UK 5 to 5.5, through S, M and L. Take your normal shoe size.
Have you written anything about this exact product?
Yes, we have covered this exact product: The OMP First Set: Suit, Boots And Gloves, And Which Colours Actually Go Together. That is first-hand coverage from our own builds and showroom, not brochure copy.
Do I actually need FIA underwear?
If your championship requires it, this is the layer scrutineers ask about, and it is strongly recommended under any suit regardless. These socks are homologated to FIA 8856-2018, the current FIA standard, so the label is there when scrutineers ask for it. Our guide on whether fireproof underwear is mandatory covers the rules championship by championship.
What size should I go for?
Sizes run from XS (UK 5-5.5 | EU 38-39) to L. Underwear layers should sit close to the skin without pinching, as loose fabric wrinkles under the suit and gets uncomfortable fast. Between sizes, take the smaller one for a base layer.
How do I wash it?
Underwear layers are the one bit of racewear you should wash after every use: cool and gentle, no bleach or fabric softener, air dry. That keeps the suit itself needing far fewer washes. Full routine in our racewear care guide.
At GSM Performance, our priority is to maintain the utmost hygiene and quality standards for the benefit of our customers. To that end, we have instituted a policy that all purchases of long johns, balaclavas, tops, and underwear are final and non-returnable. This policy is necessary due to the personal nature of these items, which are worn in close contact with the body. This protocol is intended to guarantee the health and safety of all our customers.
This policy adheres to the best industry practices and safeguards both our customers and our staff. It's important to clarify that this policy does not affect your statutory rights as a consumer. This policy does not apply if you receive damaged or defective products. In such cases, our customer service team is available to promptly address your concerns and arrange a replacement or refund. We greatly appreciate your understanding and adherence to our hygiene policy and thank you for your continued confidence in GSM Performance. For further information please see our terms and conditions which are agreed on checkout.
