Waterproof, Breathable Head Coverage for Wet, Soggy Days Outdoors The Stratoburst Rain Hat is built with technical and breathable waterproof materials for wet, soggy days spent on the trails or in the alpine. Built with bluesign® approved recycled polyester, the Stratoburst Rain Hat's Ventia™ 2.5L fabric is waterproof with fully taped seams, designed to keep your head dry in the wettest conditions. This material features just the right amount of stretch for all-day comfort, and the adjustable back cinch keeps the hat secure in windy conditions. The floating foam-stiffened brim adds structure and won't sink to the bottom of the river, and the hat packs down small for quick, easy storage. Whether hiking through the rain forest, dodging finicky alpine weather, or casting a line at the lake on a soggy afternoon, the Stratoburst Rain Hat delivers breathable wet-weather performance and comfort.