Best for: This gorgeous Sleeveless Interlock Sweat is your go-to studio layer. Pair with the companion Interlock Sweat Shorts or with leggings.. . The features: This sweat is generously cut with a drop hem at the back to cover your bum. The seamless sleeves show off the best bit of your arms. Comfy, relaxed and flattering.. . Our fabric: This compact sweat is soft and smooth and breathable. This dense, interlock-knit fabric gives you a premium feel.. .. Washed Black. 67% Bamboo Viscose, 27% Organic Cotton, 6% Elastane. Easy care - wash at 30°