ALPINESTARS Unisex Size M ZX Underwear Series Socks BNIB FIA 8856-2000 Approved
£29
Is supportive and adheres to the FIA 8856-2000 guidelines (search for this online to find the specificatikns from the FIA. This Alpine Stars ZX Underwear is mainly for racing cars but it could be ideal for karts as well . ).
