Protect your feet and achieve maximum comfort with silicone orthotic insoles. Created for use during sporting activities, the insoles protect your calcaneus heel bone and metatarsal heads. This helps relieve heal pain and rear foot trauma and will maximize comfort. The insoles are made of high-quality, medical grade silicone for metatarsal and calcaneus bone support. They improve blood circulation in the legs by absorbing and dissipating shock forces. They are flexible and can be adjusted to any footwear while always keeping their original shape. Wash with mild soap and warm water.