evo.com | Arc'teryx Ball Caps > The Arc'teryx Silex Hat handles everything from scorching desert sends to drizzly Pacific Northwest bouldering sessions without breaking a sweat (even if you do). This unstructured cap pairs a sleek, button-free nylon-spandex plain weave with bold graphics that actually look good, while the internal mesh sweatband keeps moisture in check when the temps climb. Adjustable Snapback Closure Unstructured Style Nylon-Spandex Plain Weave 93% Nylon / 7% Elastane | Arc'teryx Silex Hat 2026 - S/M in Black Size Small/Medium | Nylon/Spandex/Elastane