The Birkenstock Birko Flex Arch Support InsolesThe Birkenstock Birko Flex were built off of the original Birkenstock Sandals & Footwear platform for a familiar foot comfort feel & orthotic arch support for your everyday shoes. The pure unlined EVA Insoles are the ideal water-proof insole that provide a deep heel cup for natural cushioning and shock absorption, natural contoured arch support for longitudinal medial arch support, and a low impact metatarsal support Features & Benefits: Orthotic Arch Design: Provides proper foot alignment and balances out foot impact areas for shock absoption Reduced foot fatigue, and potential of increased footwear life. Waterproof -great for outdoor activities EVA Base: EVA construction provides flexibility and absorbs impact shock while molding to your feet over time for superior comfort High Flanges: Raised side flanges aid in controling foot movement and stability to reduce both Over Pronation & Supination Deep Heel Cup: Provides natural cushioning, shock absorption, and protects the heel bone for foot pain relief It can easily be ground and beveled for custom accommodation Hand Washable Item# 1001170 (formerly item #10522) Ideal for: Shoe type: athletic, casual, and work shoes and boots Activity type: sports activities, fly fishing, water sports, fishing, standing & situations where ones feet may get wet Arch type: low, medium Fit profile: low to med-profile insole Pain relief: Achilles tendonitis, plantar fasciitis, arch pain/strain, high arched feet, overpronation, flat feet, shin splints, bunionsAvailable in a WIDE Birko Flex Insole or Childrens Birko Insole style too Low to Medium Arched FeetCheck out all the Birkenstock Insoles Today! Looking for pain relief? Check out our best insoles for plantar fasciitis.# 1001170