TIESTRA Insoles for Womens Memory Foam Shoe Inserts,Replacement Insoles for Work Boot Running Shoes-Shock Absorption and Cushion for Feet ReliefTIESTRA Insoles for Womens Memory Foam Shoe Inserts,Replacement Insoles for Work Boot Running Shoes Shock Absorption and Cushion for Feet Relief The natural WOOL insoles helps absorbs and disperses moisture,protect effectively your feet against cold weather and keep the warmth even though icy days. High density memory foam materia could provide cushioning energy to the feet to relieve muscle fatigue in feet and legs. Ergonomic design is comfortable