Waterproof and lightweight, the Duality Mountain Cap is constructed from seam-taped breathable GORE-TEX ePE Performance Technology and features a wicking internal microfleece lining, stiffened peak, rear adjustability and optional chin strap.Construction GORE-TEX with Gore performance technology. Plain weave 70 denier recycled nylon. Smooth surface, dull optic, great hand. Utilising Gore's ePE membrane providing a PFC/PFAS free dwr and membrane technology. Brushed tricot lining provides lightweight insulation, dries quickly and has a soft feel for instant comfort. Features Soft microfleece lining for comfort and moisture management Pre-curved stiffened peak Integrated ear flaps Rear adjustability for a secure fit Removable and adjustable chin strap Materials100% Nylon (recycled); 100% Polyester (recycled)