Buff Tech Fleece Windproof Perform Hat The Buff Tech Fleece Windproof Perform Hat is ergonomically designed, specially around the ear, with two seams on the head. A technical and windproof hat that offers protection from wind and extreme cold during high-intensity activities. The hat combines several fabrics to offer total protection and provide superior warmth. Developed with Vuelta fabric which covers the entire head which offers protection from the wind while fuga fabric covers the forehead and ears to also protect them from the wind. Three small laser perforation provide an optimal fit around the ear to aid hearing and comfort.