Overview: The Birkenstock BirkoSport Arch Support Insoles are a semi-rigid, two-piece, full-length insert that provides a deep heel cup for natural cushioning and shock absorption, a natural contoured arch support for longitudinal medial arch support, and a metatarsal support cushion with a gently raised platform for raising toes into the natural position. They are ideal for a low to neutral foot arch, BirkoSport are constructed of Birkenstock's patently unique blend of natural cork lined BirkoCork bottom piece insert with moleskin and a BirkoZell foam cushion top piece. When combined, these things provide superior cushioning and arch support for the entire foot length, however, both pieces can be worn separately. Product Features: Semi-rigid orthotic arch support insole Full-length footbed Provides proper foot alignment Balances out foot impact areas for shock absorption Reduced foot fatigue Potential of increased footwear life BirkoZell: foam top piece that absorbs and wicks away moisture BirkoCork: cork and EVA construction provides flexibility and absorbs impact shock Moleskin anti-slip bottom coat increases durability and protects BirkoCork for longevity of footbed life Moderate raised side flanges aid in controlling foot movement and stability Deep heel cup provides natural cushioning, shock absorption, and protects the heel bone for foot pain relief Hand washable Arch height: 35 mm Thickness at forefoot: 2.75 mm Thickness at heel: 5.25 mm Made in Germany Slight wear