"Shoe inserts support the natural movements of the foot with AQUA TITANIUM technology. Lightweight, bouncy material is applied to the main part of the pad. Force-absorbing material is used for the arch and heel of the foot - places that absorb a lot of high-impact force. Technology : Aqua Titan x Aqua Silver x Aqua Palladium. Material : main body (100% acrylic resin), surface (100% polyester), lining pad (100% silicone)."