CW-X Women&#39;s 3/4 Length Stabilyx Tights Polyester 80% / Spandex 20% Imported UPF 50+ for UVA/UVB protection Ab support panel provides extra support for lower abs, hips and back Flat seam construction eliminates abrasion, increases comfort and enhances fit Patented Exo-Web helps the muscles and ligaments band together to stabilize knee joint 4-way stretch moisture wicking body fabric helps to keep body cool and dry Refer to size chart for ideal sizing.