Whether you're ducking the scorching desert sun of Indian Creek or cruising Squamish granite boulders in a light drizzle, Arc'teryx's Silex Cap blends an unstructured style with serious climbing performance | Its nylon-spandex plain weave delivers a sleek, button-free look with bold graphics, while the internal mesh sweatband ensures all-day comfort and moisture control—keeping you cool through the hottest days and longest pitches. PRODUCT FEATURES: Lightweight durability, shade, and sweat management for climbing. Primary farbric: 93% nylon, 7% elastane, secondary fabric: 100% polyester Primary Fabric - Bluesign Approved Material Snap back adjustment strap Spacermesh™ sweatband promotes breathability and absorbs perspiration Button-free top ensures a clean look and seamless fit under a climbing helmet Lightweight, rounded brim stays low-profile and out of your way as you move Lightweight Durable Water repellent Contains materials that meet the bluesign® criteria Primary fabric - bluesign® approved material PFAS (Per- and polyfluoroalkyl substances) Compliant Contrast: Morse Mesh, 185 gsm - 100% Polyester Body: Nylon/Spandex Plain Weave, FC0 DWR, 112gsm - 93% Nylon, 7% Elastane Origin of fabric: TAIWAN, CHINA Origin of dyeing: TAIWAN, CHINA