Delivering two hat looks in one package, the Reversible BUFF Hat is made from two layers of microfibre, in two differing patterns. This stretch fit beanie is great as a cold weather base layer for all outdoor activities, including climbing, trekking, hiking and running. The two layers improve insulation, with air trapped between the two helping to maintain head temperature. The Reversible BUFF Hat is treated with Polygiene, containing anti-microbial silver chloride, so your hat will resist bacteria build-up and remain fresher for longer. The BUFF Hat weighs 44g.