Carbon Fiber Shoe Insert Semi-Rigid Insole1 PieceLength 26.0cm(Fit Men Size 9.5/Women 10.5)

[Less stiffening and more flexible carbon fiber insert Treatment for injuries such as turf-toe mid-foot sprains metatarsal stress fractures toe fractures hallux limitus prevention of recurring chronic injuries and transition from rigid insert to semi-rigid as injury improves. Carbon fiber insert thickness:1.0mm it is light and thin. They can be worn on your right or left foot. And the insert must be placed directly under the removable shoe insole or under orthotic. For proper fit carbon fiber insert must be ¼ - ½ inch (approximately 1 cm) shorter than removable insert in shoe (because it is stiff) If in between sizes or half sizes round down to smaller size and you should use this semi-rigid insole below your original removable insole. Carbon fiber material is used in medicalairplanes space technology race cars and sporting goods equipment for the unique combination of lightweight high stiffness and durability. Very thin thickness of carbon fiber sheet has enough hardness and strength. "The carbon insert also protects your feet and shoes when youre hiking on rugged terrain outdoors it can effectively prevent the shoes from over twisting and the puncture of sharp objects."]