Footprint Game changer custom orthotic insoles are recommended for people with low/fallen arches and flat feet with pre-existing joint pains, or people with mid arches who want serious protection and added balance and primo protection. Game changer insoles are covered from heel to toe with Artificial Cartilage foam which absorbs up to 90% of impact energy. With it, Game changers will give you more power, stability, endurance and balance. It also has a very firm custom arch which is necessary to fully support the arch which then keeps the knees fully aligned. This is the ultimate joint support. To mold the shape of the arches, simply warming the insoles in the oven with 225 f or 110 C for 5-8 minutes or until arch is soft till inner arch react and rise and mold to your arch high. As it cools down, insoles firm in your specific arch shape and give you real custom orthotic support similar to what doctor give you. Full durability with toe stitching and forefoot pad fabric protection. 100% satisfaction guaranteed. Thanks to the firm custom arch support, you will never feel pain from primo again. Patent pending design.