Icebreaker Quantum Headliner - $29.95

If you've ever tried wearing a beanie under a helmet, you know that it's less than ideal. The Icebreaker Quantum Headliner uses a 260g merino wool for low-profile comfort and insulation. Built with convenient earflaps, it fits under any type of helmet be it snowboard, ski, mountaineering, or climbing-style helmets. - $29.95