Tribesports Women's 2 in 1 Gym & Running Shorts - Black 100% Polyester Built-in fitted under short for additional coverage and support. zoned power mesh ventilation panels for maximum comfort and enhanced breathability. Elastic waist with interior drawcord to customise fit. feminine extended waistband for added support and flattering fit. Hidden velcro seal internal key pocket on back right. ergonomic flatlock seams give a performance enhancing, anti-chafe finish. 360 degree reflectivity for enhanced visibility in low-light. aegis antibacterial treatment creates a protective shield, providing active freshness. Loose lightweight stretch woven fabric outer with with 4-way stretch power mesh ventilation panels for full range of motion. fitted 4-way stretch moisture wicking inner for added support and coverage. (88% polyester, 12% spandex)