jxhracing RB-CR014 One Piece Auto Go Karts Racing Suit Yellow Medium SFI 3.2A-1 Homologation. Fabric: one layer 100% flame-resistance cotton. Flame resistance level: EN531 and ISO15025.Knit shoulder gusset for full range of movement. Concealed zipper design with two ends. Velco collar and belt are convenient for putting on or taking off.Knit rib design for cuffs and feet.Lower back stretching panel.Delicate embroidery logo.