The Jetstream Beanie was born from the same fabric as our celebrated Jetstream Jacket and will keep your head in the game while trudging up into the biting wind or glassing on an exposed ridgeline. A lofted micro-grid fleece backer supplies warmth while the WINDSTOPPERA(R) by GORE-TEX LABS membrane blocks drafts from your dome and forehead. Product ID: 600482 Weight: 1.6 oz. Fabric: WINDSTOPPERA(R) by Gore-Tex LabsTechnology, Stretch-woven polyester face. WINDSTOPPERA(R) by Gore-Tex Labs: Offers complete windproof protection through a durable, lightweight, and breathable membrane. Imported