product highlights • r'gum performance rubber that withstands intensive use. • r'fit system: upper design tapered at the instep for a perfect fit. • front, rear and ankle bumper reinforcements for optimal abrasion resistance. • the ribbed instep reinforcement also helps preserve flexibility and ease of movement • comfort gusset and adjustment buckle located at the back, adapting to all calf shapes. • isola+ neoprene lining (4mm) providing maximum insulation even in extreme conditions. • r'flex rubber sole with improved flex zone for greater flexibility. • r'grip system: made of rubber and special studs for maximum traction. • removable anatomical comfort soft insole in EVA foam for superior comfort. • removal pull tab. • delivered in box