LIGHTWEIGHT BREATHABLE COMFORT: This fabric is made from ultra-fine yarns knitted into a high-density performance fabric, creating a mask that is lightweight, breathable, and soft against the skin. Fabric is made from 85% Polyester & 15% Spandex utilizing special ATB-UV+ yarns which contain silver ions.SINGLE-PLY 3-LAYER CONSTRUCTION: This mask is made using a special knitted construction, which allows this single-ply thin piece of fabric to have a 3-layer structure, consisting of a top and bottom layer of high-density performance fabric, knitted together by a connecting layer of ultra-fine yarns. This creates a dense multi-layer structure in line with CDC recommendations.QUICK DRY: A uniquely designed fiber cross-section allows this mask to dry much faster than cotton fabrics. This allows exhaled moisture to evaporate much faster, reducing the hot and clammy feeling common to other masks, keeping you cooler and more comfortable. UV PROTECTION: Due to high-density construction, this mask is rated UPF 50+ blocking ultraviolet rays UV-A (290-320nm) and UV-B (320-400nm).REUSABLE & WASHABLE: Made of a durable high-performance fabric, this mask has been tested to 50x washes with no noticeable change in the color or durability of the item. Please follow care instructions and wash in small mesh laundry bag for best results.STRETCH & FIT: As per CDC guidelines, a proper snug fit is one of the most important criteria for masks. By using a 15% spandex stretch fabric with a middle seam construction, this mask allows for a better fit and seal, which minimize the gaps where outside air can flow in.