MATERIAL: 53% polyamide, 37% polyester, 10% elastane. FIT: True to size. DESIGN: The Core Collection seamless knit fabric feels incredibly sleek and lets your skin breathe. This sports bra has a halter neck deisgn and seamless construction ensure both comfort and a trendy look, making it perfect for a range of workouts. This sports bra has medium support and gives enough coverage for various sizes.  MODEL: The model in the first photo is 5'11", 150 lbs. and wears size Small.