?Two Size selection?We have 2 sizes to accommodate all size arms. M for smaller arms and L for larger arms. To determine the correct size needed, measure the circumference of the middle of the bicep. The M size fits 9-12.5 inch biceps. The L size fits 13-16 inch biceps. ?4 Velcros straps?The tightness can be adjusted freely. The hook and loop design is more convenient and faster than the positive pull design. The straps are easy to adjust with one hand, for desired compression and support, fits left or right arm. It’s easy to put on and take off whenever necessary. ?Lightweight and Comfortable?The night elbow splint has soft foam padding lined with breathable cotton and covered with flannel-like fabric that allows your skin to breathe; allow you to sleep comfortably throughout the night and wake up in the morning feeling refreshed without arms pain. Lightweight and comfortable for all-day wear and night use. ?Adjust the bending angle?Lightweight aluminum strip allows you to adjust the elbow brace to the therapeutic Angle from 90 to 180 degrees for your comfortable fit. Sylong elbow brace can be bent to whatever angle you need,many other braces do not. ?Pain-free and Comfortable?Sylong Elbow Splint is best for cubital tunnel syndrome, and all types of Elbow joint and tendonitis, tennis elbow, injuries, elbow fractures and discomfort. It provides excellent and comfortable support, and gently fixes the elbow to prevent excessive bending of the elbow during rest and sleep.