The ALWRLD ALRN Merino Beanie is made with merino wool, a natural and sustainable material that is both temperature regulating and moisture-wicking. These attributes keep you warm and dry during cool weather runs. The other materials in this fabric blend are made from recycled nylon and elastane to create the perfect, planet-based accessory for this winter season. Details: Thermoregulating fabricDarted in seams for perfect fit