What Our Gearhead® Experts Are Saying:"This is my go-to beanie under a helmet or hood—super warm without bulk. The ThermoNet® fabric is lightweight, stretchy, and stays dry even on sweaty climbs. I forget I’m wearing it half the time, which is exactly what I want from winter headwear."We wear the ThermoNet Beanie when we're pushing through frigid conditions and need low-profile warmth that won’t get in the way. Designed for fast-moving mountain missions, this ultralight beanie fits cleanly under helmets and hoods while delivering high-performance insulation with zero bulk. Bonded seams and seamless 4-way stretch give us the chafe-free comfort we crave on cold, high-output days. Thanks to PrimaLoft® ThermoNet® technology, we get warmth that punches above its weight. This beanie is breathable, moisture-managing, and made with recycled fibers to keep our impact low while we chase fresh snow or summit views. Lightweight, compact, and ready for anything—it’s the piece we never leave behind.