CW-X Men's Stabilyx Running Tights,Black,X-Large Polyester 80% / Spandex 20% Imported Stabilyx tight provides targeted support for lower back, Hip, Gluteus, IT band, Knee, Calf and Abs/Core areas Coolomax body Abdominal support pannel Reflective "flash" on logos The supportive conditioning Web technology provides targeted support to specific muscles and joints where it is needed most Experience less muscle fatigue, faster recovery and targeted support Flat seam construction eliminates abrasion, increases comfort, and enhances fit.