When the trail calls but winter weather threatens to shut down your run, the Patagonia Winter Duckbill Cap delivers the perfect balance of protection and breathability for cold-weather trail running. This clever cap features a water-resistant crown that sheds snow and sleet while breathable fleece side panels prevent overheating during high-output winter activities. The flip-down fleece earflaps give you total control over your comfort level, keeping ears toasty when temperatures drop or folding away when you're generating serious heat on the uphills. Best of all, the crushable brim design means this packable running hat stuffs easily into your pocket when you need to shed layers, making it your perfect companion for those unpredictable winter adventures where conditions can change as fast as your heart rate.