These spa slides' adjustable hook-and-loop fasteners provide a comfortable fit that compares only to custom made footwear. Their insoles are polyurethane foam that mold themselves to the unique shape of your foot, eliminating pressure points and reducing shock from walking and standing. They have enhanced heels and arches that provide long-wearing comfort. Between wearings, the foam insoles rebound to their original shape. The slides have waterproof, non-skid soles that allow outdoor wear. The soft terry cloth uppers allow the slides to be machine washed and dried. Sizes S (7 1/2-8 1/2), M (9-10), L (10 1/2-11 1/2), and XL (12-13). Black or Chocolate.