Our classic mask is made of Tri-Tex, a soft and spongy, 3-layer sandwich material. This unique material has a poly sponge-like fibrous inner layer, each side bonded with 2 thin layers of soft knit (92% poly and 8% spandex). This unique material is breathable and amazingly soft on the skin. Nylon/spandex creates the continuous binding that securely holds the mask shape and forms the stretchy ear loops, allowing it to sit comfortably over the face for long periods of time. The Classic Tri-Tex MyShieldMask durable quality is sure to please, giving long lasting, beautiful protection even after over a hundred of washings!