Buffs UVX Mask has been updated with ultra lightweight UPF 50+ fabric and contouring 2-way stretch, which forms over the back of the head for an enhanced fit and streamlined look, shielding the neck and face on relentlessly sunny days. The ultra-light UVX fabric wicks and dries quickly and laser-cut breathing holes aid airflow and helps prevent sunglass fog. Wear it under a cap and tuck the bottom inside or outside a shirt for complete head and neck sun protection.