1. Important note: You are a carbon insole in this offer, not a pair. The insole can be used by simply flipping it left or right. Please measure the inner dimensions of your shoes accurately before ordering—both length and width. The Hallux Rigidus insoles can help you walk or hike without discomfort. 2. CAN HELP PAIN – Our carbon fiber insole is the ideal choice to reduce pressure on the metatarsal joints and toes while relieving foot pain, including conditions like Morton's Toe, Hallux Limitus, Hallux Rigidus, Lisfranc Injury, Metatarsalgia, Forefoot Trauma (Sprained Toes), etc. 3. Suitable for Athletes: With the carbon fiber shoe insole, you can significantly enhance the comfort of your sports shoes (football, basketball, etc.) and reduce the risk of injury. These insoles help prevent fatigue during sports activities. They also protect your feet and shoes when hiking or running on uneven terrain. 4. ORTHOPEDIC SHOE INSOLES: These thin insoles for men and women are flat and from deformation. The carbon base material provides flexibility while ensuring the insole returns to its original shape after use. At just 1.9 mm thick, they can be placed under your existing removable shoe insole or an orthopedic insole. 5. Sports Shoe Insoles: These insoles are designed for both foot pain relief and various sports activities, including trekking, hiking, basketball, football, running, or daily walking. The rigid structure helps prevent foot fatigue during daily use. They are suitable for both men and women.