The North Face Base SUN Sleeve

"The Base SUN Sleeve from The North Face is the ideal companion for anyone who enjoys being outdoors, whether it's speed hiking, fitness & training or mountain biking. These arm warmers are made from recycled material, which not only protects the environment, but also reduces waste and minimizes the impact on nature. Thanks to the stretch material, you enjoy optimum freedom of movement and maximum comfort while benefiting from the breathable fabric technology that effectively regulates your body temperature and prevents overheating."
"The reflective details of the Base SUN Sleeve ensure that you are clearly visible even in the twilight, which is particularly beneficial during outdoor activities. The silicone grip tape with branding on the sleeves ensures a secure fit so that you can concentrate fully on your sporting challenges. Whether the sun is shining or the temperature is dropping, the Dipsea Sun arm warmers always offer you the protection you need and an additional layer of warmth."