Phiten"s Innersole are designed to be breathable, durable and flexible.Constructed using materials with impressive shock absorption qualities and containing Micro titan balls and Aqua-Silver, they relax the muscles of the feet improve circulation and reduce fatigue through the lower leg.The Aqua-Silver also guards against bacteria and microbial build-up to control odour.Size 9 inches to 11 inchesMade in Japan