This LOWA ATC Insole is designed for people who spend a lot of time walking. These insoles are made of cushioning polyethylene foam that help reduce feet fatigue. The material composition creates a pleasant feeling of comfort. Insole: Unisex Sizing suggestions: Women's boots: please size down a full size example: if you wear a women's boot size 9.0, you would purchase an ATC Insole in size 8.0 Men's boots: if you wear a men's boot size 9.0, you would purchase an ATC Insole in the same size. 9.0 Replacement insoles: Recommended for hiking models Cushioning: Polyurethane foam for fatigue-free walking Wicking: Moisture-transporting materials for pleasant climate comfort