bamboobies Women's Nursing Tank Medium/Large Black 75% Bamboo Viscose/20% Polyamide/5% Elastane Bamboo rayon is unbelievably soft - and more breathable than other fabrics New-mama must-have: long, stretchy and comfortable. Great for pregnancy, nursing and beyond. Everyday comfort - and a wardrobe staple. Nursing clasps, wire-free design, and soft support. Fiber Contents: 75% Rayon made from Bamboo, 20% Polyamide, 5% Elastane