A Breathable Arm Sling Built for the Active Life Don’t let an injury hinder your active lifestyle. The Think Ergo Arm Sling Sport is comfortable, lightweight, and breathable — perfect for those who are on the move.  Built-in thumb loops support your hand to prevent fatigue The arm pouch is made from polyester. For added support, it has elastic thumb loops to prevent your hand from getting tired. With a front-facing micro Velcro adjuster, you can easily adjust the length with one hand. Its padded neoprene strap won’t dig into your neck and shoulder and is made for all-day comfort. Size: Youth/Extra Small Adult (Length between 8.5"-10.5", measured from Elbow to wrist) Will this arm sling fit you? We recommend the Think Ergo Arm Sling Sport Extra Small for adults and children who need a smaller arm sling. The arm length, measured from elbow to wrist, is between 8.5-10.5 inches. Strap length: 29 inches Pouch length: 11.5 inches We have arm slings in other sizes: Think Ergo Arm Sling Sport - Recommended for adults 5 feet-6 feet tall, 90-250 pounds. Pouch length is 14 inches (fits most users).   Think Ergo Arm Sling Fit XL - Recommended for adults who need a longer arm pouch. Pouch length is 14-17 inches (the length is adjustable). Think Ergo Arm Sling Sport Instructions: 1) Take the arm sling out of the box and lay it on a flat surface, such as a table. 2) If you will be using the arm sling on your right arm, the opening of the arm pouch should be pointing to your left. If you will be using it on your left arm, the opening of the arm pouch should be pointing to your right. 3) Thread the strap through the loop, and pull up to tighten. Once you've reached the desired length on the strap, secure the Velcro closure 4) Put the arm sling on. The strap should be centered on your shoulder and the arm sling should be comfortably supporting your arm. Adjust length with the strap at the front.