The DonJoy Lateral J knee brace is one of the most popular patella stabilizing brace. The brace is equipped with a tubular, lateral "J" buttress that runs alongside the knee and provides support against lateral patellar subluxation, dislocations, or improper patellar tracking. The Lateral J can be worn during day-to-day activities, as well as sports and in water. Drytex or Neoprene? Drytex is DonJoy's exclusive solution for patients with neoprene sensitivities or those who prefer less warmth from their bracing. Constructed of a unique patented nylon core and polyester Lycra fabric, it allows for improved airflow while still giving ample support and compression. Perfect for people in warm weather climates and those with neoprene allergies or irritations. (Photo images are of Drytex material with seams. Neoprene material, not shown, does not come with seams). Neoprene is a thicker material that will provide more warmth. With or Without Hinge? This brace is available with a removable hinge for added stability for an additional cost. You should order the brace with a hinge if you have joint instability. It will provide more medial and lateral support. Otherwise, you should order the brace without a hinge. Sizing Size Thigh Knee Center Calf XS 13" - 15 1/2" 12"-13" 10"-12" S 15 1/2" - 18 1/2" 13"-14" 12"-14" M 18 1/2"- 21" 14"-15" 14"-16" L 21"- 23 1/2" 15"-17" 16"-18" XL 23 1/2" - 26 1/2" 17"-19" 18"-20" XXL 26 1/2" - 29 1/2" 19"-21" 20"-22"
