The very-rigid carbon fiber insoles has a thicker thickness,maximum stiffening and minimal flexible. Treatment for for foot arthritis, advanced hallux rigidus post-op care of foot and toe surgeries, or other conditions requiring minimal bending of the foot. They can be worn on your right or left foot.
Carbon fiber insoles are made of pure premium carbon fiber, they are durable,rigid,thin,lightweight and corrosion free.
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 very-rigid insole below your original removable insole.
Risk-free purchase: Amazon's return policy is fully supported. If you want to change the size or are not satisfied with the product, you can apply for a return, and the refund will be fully returned to you.