Our solid color YOGAZ are made of 95% Bamboo and 5% Spandex and our prints are made with a special Micro-Fiber Poly-Spandex Blend. Bamboo was designed as a replacement for silk. It is Hypoallergenic, UV 50 Protectant, Anti-Bacterial and is the softest thing you have ever worn in your life. All of our fabrics can be washed over and over again and come out looking like new. We know this for a fact as our customers have told us so.