Body Geometry Footbeds are ergonomically designed and scientifically proven to enhance power, endurance, and comfort by optimizing hip, knee, and foot alignment. Proven to increase power and reduce injury, they offer customized longitudinal arch and metatarsal support with three contour options. Made with proprietary lightweight foam for long-lasting performance, they work best when combined with Body Geometry shoes, delivering a power increase of seven watts. Features: Blue ++ Support for medium arch heightCompatibility - All Body Geometry ShoesGreen +++ Support for high arch heightMaterials - Proprietary lightweight foam for long-lasting performance.Red + Support for low arch height