FIA 8856-2018 approved Relaxed fit Comfortable soft touch material These long johns are part of the RW-4 race underwear range from Sparco which has been designed with a more relaxed shape. Constructed using a soft touch, flame retardant material for a more regular, comfortable fit with high levels of heat and flame protection. Highly comfortable soft touch material Relaxed shape for a more regular fit High levels of heat and flame protection Sizes XS - 26"-28" waist (77-70cm) S - 28" to 31" waist (70-78cm) M - 31" to 34" waist (78-86cm) L - 34" to 36" waist (86-91cm) XL - 36" to 38" waist (91-96cm) XXL - 38" to 41" waist (96-104cm) XXXL - 41" to 43" waist (104-109cm) FIA 8856-2018 approved