Katie K. Active Workout Open Back Tee Tops - Signature Ruched Shirttail Hem Tee - 1X, Citrus Zebra - Also in Plus Sizes - from Featured on Nbc's The Biggest Loser and Cosmopolitan With the OPEN BACK detail, this T-shirt MERGES STYLE & FUNCTION. 60% cotton / 40% viscose SOFT, ULTRA-LIGHTWEIGHT burnout fabric is INCREDIBLY COMFORTABLE and BREATHABLE perfect for running or yoga MOISTURE WICKING fabric keeps you cool and dry. With a UV rate of 20+ this is the PERFECT TEE for any activity Ergonomic FLATLOCK SEAMS allow for easy, free movement without fear of chafing. Cap sleeves and a loosely tailored fit create an EXTREMELY FLATTERING SHAPE you will love