Engel Sports athletic wear hat that fits snug into any pocket to take anywhere, made from soft, non-scratch 70% organic Merino virgin wool, 28% silk, and 2% spandex. This combination of merino wool and silk results in maximum breathability, comfortably insulating your body from extreme temperatures. The inclusion of 2% spandex reinforces the natural elasticity of the wool fibers, enabling the clothing to retain its shape remarkably well. This garment is a warm fabric weight of 200 g/m2. These pieces can be worn directly against to skin or as a mid layer (second layer) over lighter-weight items, depending on how cold or warm you feel. This fabric is more robust and substantial than the 150 g/m2 version, offering more room for air pockets than provide thermal insulation. The fine, soft blend of merino wool and silk protects against over-cooling, insulating against temperature extremes no mater the weather condition. The natural properties of the wool/silk blend produce which greatly reduces the buildup of odor caused by sweat. These garments do not need to be washed often- simply hanging them out in the fresh air between uses is sufficient until laundering is necessary. Fits snug into any pocket 70% organic Merino virgin wool, 28% silk, 2% spandex Maximum breathability 200 g/m2 weight fabric Insulates against extreme temperatures Naturally repels buildup of odors from sweat Engel Sports Wool/Silk Blend Pocket Hat