The Base Sun Sleeve from The North Face adds protection for the arms whether the sun is shining or the temperature is dropping. Breathable fabric with FLASHDRY™ technology pulls moisture away from the skin to keep the wearer comfortable. The stretchy blend of recycled polyester and elastane fits close without restricting movement. Branded silicone grip at the openings keeps the sleeves in place during activity. The fabric protects covered skin from harmful ultraviolet rays. A reflective logo adds visibility in low light.