The Med Spec® Shoulder Immobilizer features a soft padded shoulder strap that provides exceptional comfort. In addition, the soft padded waist strap restricts abduction and external rotation of the shoulder. The shoulder and waist strap are now made from a new material that provides greater durability and resistance to stretching. The new material used in the construction of the envelope is also more durable, yet it is still very comfortable and breathes well. The single plastic ring above the hand allows for easy application of the shoulder strap. Bilateral design fits right or left shoulder. To determine proper size, measure the linear distance from the tip of the elbow to the knuckles.