Arm warmers are an excellent option for chilly days or those times when temperatures might change throughout your ride. Simple on and off design gives you the option of adding thermal sleeves on-the-go. Giro uses seasonal blended Merino wool for excellent warmth and stretch without bulk. Merino wool is an efficient moisture wicking material and provides time tested thermal insulation, keeping you warm and dry. Tubular weaving creates a clean construction, allowing a form-fit without fuss and without chafing. When it's not cold enough to make a full commitment to sleeves, the Giro Merino Wool Arm Warmers offer all the coverage you need with the convenience of easy removal.