3D and ergonomic design cutting that comfortably hold breast during sleeping Ideal replacement for traditional bra when sleep Prevent bust sagging Measurement under bust for M size : approximate 60-70 cm / 23.62 - 27.56 inch Measurement under bust for L size : approximate 70-75 cm / 27.56 - 29.53 inch Material : 85 % Polyester + 15 % Polyurethane Hand wash only