If heat and sweat are a constant battle, the super breathable, sweat absorbing XT Compact cap is your secret weapon. Perforated fabric throughout ensure maximum air flow. When you have enough teeny tiny holes, it makes for big time air flow. So Salomon perforated the fabric and the brim of this cap. Shade your eyes and your head as you run in the high mountains. No more eye-sting from sweat dripping into your eyes with this soft, absorbent, stretch sweat band integrated into the cap. Material: Polyester, Mesh.