Stretch fleece liner hat with GORE WINDSTOPPER® headband This lightweight GORE WINDSTOPPER® Montane Windjammer Helmet Liner is designed to work harmoniously with technical climbing helmets. Its low profile, close fitting stretch fleece upper provides warmth and comfort for a snug fit under a helmet. The GORE WINDSTOPPER® headband creates a windproof barrier where it is needed most. Features: Designed to layer under climbing helmets Close fitting Windproof Lightweight Stretch Packable Extremely breathable Weight: 29g CONSTRUCTION GORE WINDSTOPPER® headband for windproof protection Stretch fleece upper for a close, snug fit under a helmet PATTERNING AND DESIGN Flatlocked sewn seams throughout for extra durability and comfort