STAY-COOL WICKING PERFORATED & ULTRABREATHABLE STRETCH FLATLOCK SEAMS FOR COMFORT 8.2-ounce, 88/12 poly/spandex with stay-cool wicking technology OGIO heat transfer label for tag-free comfort Self-fabric waistband with hidden pocket Iridescent silicone O on front left hip Ventilating perforation on lower legs OGIO Endurance vertical bar heat transfer on back right calf 7/8 length