1. Non-Slip Elastic Band The tacky upper elastic band helps to prevent slipping during all types of vigorous outdoor activity. 2. 4-Way Stretch Fabric Flexible poly-spandex fabric stretches in all directions for a snug yet comfortable fit. 3. Low Profile Stiching Our flat low profile seams help to reduces chafing for maximum comfort all day long. 4. Quick-Dry Material Poly-spandex material wicks away moisture which quickly evaporates to keep you cool and dry.