Sitka Jetstream Insulated WS Beanie - Fight off the wind and cold with this small but mighty piece of your clothing system. The Jetstream Insulated WS Beanie boasts PrimaLoft Silver insulation that locks in body heat and WINDSTOPPER by GORE-TEX LABS to stop wind dead. Stretch knit panels over the ears and back of head maintain your hearing and all-day comfort. WINDSTOPPER by GORE-TEX Labs cuts wind and repels precipitation Primaloft Silver insulation Sound-permeable fabric on ears to allow for better hearing Stretch knit on rear 3/4 of head for improved fit and comfort Windproof Style: 600489