What is the Mc David Elbow Sleeve? The advanced protection Mc David Elbow Sleeve provides effective relief from arthritis, bursitis & tendonitis such as tennis & golf elbow. Featuring a 4-way stretch elastic material for compression the Elbow Sleeve is ideal for those with neoprene allergies. How does it work? The breathable 4-way stretch elastic offers exceptional compression for the elbow & forearm without becoming overbearingly hot & causing excessive perspiration. The Mc David Elbow Sleeve fits either the left or right arm & can be used by those who are allergic to neoprene. A bi-lateral gel padded area provides targeted compression to the section of the elbow that is injured which allows the Mc David Elbow Sleeve to be used for managing olecranon bursitis also. Materiel: 65% polyester/25% rubber/ 10% nylon. Size guide Measure around the circumference of the centre of the elbow. S: 8-9.5" M: 9.5-11" L: 11-12" XL: 12-14"