SIZE: One size fits all and insert design fits 35*39 feet , suitable for men and women. -- ALL DAY COMFORT: These insoles improves foot and leg alignment, enhances comfort, and helps ease stress and pain caused by Flat Feet, Plantar Fasciitis, XO-Type Leg, Knee Valgus, Overpronation and Foot Pain. -- DEEP HEEL CUTTING: Helps maintain correct foot positioning and protects your heel during the heavy impact of landing during walking or running and stabilizes the foot. -- PREMIUM MATERIAL: Made of premium material that reduces friction and helps keep the feet cool and dry. It is excellent for shock absorption and pain relief. -- DESIGNED FOR EVERYDAY USE: Comfort and cushioning for all types of leisure or everyday footwear. Provides moderate control and support in walking or casual hiking shoes, work shoes and boots.