Gul Flexor Split Toes 5mm Boot - Black The Gul Flexor Split Toe 5mm is one of the lightest boots ever. This boot features new and exclusive recoil technology.This acts in a similar way to the retinaculum that helps keep your tendons in place, preventing rolling or movement of the foot. With advanced new features this boot has been created to be a combination of warm, soft, comfortable and flexible, holding the foot in place to prevent any unwanted movement. BLINDSTITCHED: Seam construction MAGMA AIR-INSULATION: thermal inner lining is super-soft (20% Lighter and has 30% less water absorption) X-FLEX THERMAL POWERTEX4: reinforcement on frontside of boot G-TAPE: Inner waterproof X-Flex taping adds additional reinforcement RECOIL: enhanced foot support band LEASHGUARD: prevents the leash catching