100% polyester. Womens short sleeve t-shirt. Made of soft-touch, marl polyester that efficiently transfers moisture away from your skin for lasting comfort. Designed with a hint of stretch to be form fitting without being tight to allow a natural range of movement during agile hikes and walks. With the Regatta print on the sleeve. Regatta Womens sizing (bust approx): 6 (30in/76cm), 8 (32in/81cm), 10 (34in/86cm), 12 (36in/92cm), 14 (38in/97cm), 16 (40in/102cm), 18 (43in/109cm), 20 (45in/114cm), 22 (48in/122cm), 24 (50in/127cm), 26 (52in/132cm), 28 (54in/137cm), 30 (56in/142cm), 32 (58in/147cm), 34 (60in/152cm), 36 (62in/158cm).