Solite 3mm Custom Fit 2.0 Barefoot Feel Surf Booties - Black/Green*Women's size is equivalent to 1. 5 more than men's. For example, a women's size 7. 5 is a men's size 6. Simply Game Changing. Again. We've changed the bootie game again with our Solite 2. 0 technology. The 3mm Custom integrates our 2. 0 Sole in the cleanest, simplest package that essentially disappears on your feet. If you want the world's lightest, barely there boot, the 3mm Custom 2. 0 is your answer. Check the tech: 3D Molded Natural Rubber Sole