For those expeditions deep into the mountains, you have to ensure you're layered and protected properly. And when 50% of heat escapes through your head, facemasks are of the utmost importance. Grab the Airhole Airtube Ergo Polar Fleece Neck Warmer, and keep the shivers at bay all season long. And thanks to the silicone injected airhole, you're goggles won't fog.