Best for Athletes looking for increased power, speed, and explosiveness Reduction of pressure on the metatarsal joints and toes to reduce foot pain, especially for Morton’s toe, hallux limitus, hallux rigidus, lisfranc, midfoot arthritis, and mild forefoot trauma Reduction of pressure on the metatarsal joints and toes to reduce foot pain, especially for big toe sprains (turf toe), hallux rigidus, Morton's toe, and mild big toe trauma? Instructions for Use- The carbon fiber insole needs to be placed under your standard insole or custom orthotic, so we recommended measuring and confirming the size of your insole and then choosing a carbon fiber insole 0.2-0.4 inches shorter than it, which can get the maximum support and comfort. If used for medical purposes. We recommend that you consult your doctor to make sure this is the right product for you.Package include: 1 piece pure carbon fiber insole/insert,not a pair. These stiff carbon fiber insoles are made of pure premium carbon fiber. They are durable,rigid,thin,lightweight and corrosion free,NB: Check with your doctor if this is the right product for you,measure your foot To find the right Size. Rigid Support for First Metatarsal - Morton's extension orthotic support of the big toe allows the other toes to flex for better gait and balance, helps for broken big toe, turf toe, arthritic toe, Morton's toe, etc recovery. Carbon fiber insert thickness : 1.3mm,thick and it was designed to allow minimized bending (minimum flexibility) with optimized stability. The Rigid Shoe Inserts reduce the pressure between the metatarsal joints and toes and he. Premium quality carbon fiber shoe insole: (1 Pcs ). This stiff insole for men and women can be worn on your right or left foot. To achieve appropriate fit, carbon fiber inserts must be shorter than detachable inserts in shoes ¼-½ Inches (approximately 1 centimeter).