Made from COOLMAX Extreme fabric, the Buff UVX Mask blocks 95% of harmful UV radiation. Protect yourself from the sun and stay cool at the same time. Anti-bacterial, anti-odor Polygiene technology. Pull the contoured UVX Mask up over the back of your head (and hat if you\\\'d like to protect the neck, ears, and head from sunburn. UVX products can be tucked in or worn outside the shirt-either way protecting the shoulders and upper chest from exposure to the sun. Breathing holes provide breathability and prevent sunglass fog-up, and durable flatlock seams are soft on the skin. Shaped eye area for optimal fit and gusseted shoulders for contoured coverage. Increased length protects neck base, shoulders, chest, and back. One size fits most. Polyester. Washable.