SmartWool Women's PhD Seamless Long Bra Outer Shell - 57% Nylon, 28% Polyester, 15% Elastane; Lining: 70% Merino Wool, 20% Nylon, 10% Elastane Knit in Turkey Slim Fit - Engineered knit cups - Style: SW0SO160 Covered elastic band at ribcage provides a secure anchor point Wide straps provide stability and support Rib knit side panels for increased support and a smooth look and feel Seamless knit Merino wool interior for ultimate next-to-skin comfort combined with a supportive outer layer