These unisex Signature DK Response insoles from Sole are constructed with synthetic material for a great fit. EVA blended base features 20% recycled material and molds to your foot for a perfect fit. Open-cell polyurethane cushioning absorbs shock as well. 35% recycled polyester weave cover fights odor with a Polygiene treatment and wicks away moisture for all-day wear. Accepted by the American Podiatric Medical Association.