BUFF Original UV+ Arm Sleeves R-Light Grey Heather are a winner for any outdoor adventure. When you want the ultimate in comfort, moisture-wicking and sun protection, slip your arm into a BUFF® UV+ Arm Sleeve. With the elastic uppers and the specialized silicone grip engineering, these sleeves are made to stay put. The unique 4-way stretch fabric is also made with HeiQ cooling technology to keep you cool regardless of the temperature. These sleeves are highly portable and can easily be stored in a pocket or pack.