Arm sleeves, widely used among runners and cyclists, especially during the colder months, when we have to train early or late in the day in cold temperatures. Velvety inside, the feeling of softness and comfort, but also of thermal protection, is constant. The fabric is made of polyester and elastane and provides us with effective blocking of UV radiation. The OTSO arm warmers are made entirely in Europe in three different sizes, so that they adapt perfectly to any arm. MAIN FEATURES Made entirely in the European Union Thermoregulation 100% Breathable Sweat transport ventilation 87% Polyester, 13% Elastane 30 Days for Returns Quality Assurance You have 30 days to return your products. We don't ask questions. Products 100% made in Europe with the best materials.