Band is simple to install and adjust; no-slip locking NRS cam buckle allows easy adjustment even while sitting. Reinforced grommets on webbing. Thermoformed with bi-density ½" foam construction -- uses softer 4 lb. foam against your back and 10 lb. foam to maintain backband's rigidity and position. Nylon. 14½x6". 8 oz. Closeouts. USA. Size: One size fits most.