jxhracing RB-CR002 One-piece One Layer Auto Go Karts Racing Suit-XXX Large SFI 3.2A-1 Homologation Fabric: one layer 100% flame-resistance cotton.Flame resistance level: EN531 and ISO15025 Concealed zipper design with two ends. Velco collar and belt are convenient for putting on or taking off. Knit shoulder gusset for full range of movement.Elastic design for the waist. Knit rib design for cuffs.Boot cut legs outside, inside with rib hems.