Mem-Lok^® RCM and Mem-Lok^® Pliable are effective barrier membranes which prevent the ingrowth of soft tissue and allow the formation of new bone. The resorbable Mem-Lok RCM collagen membrane of bovine origin, is made from highly purified collagen fibers of type I to ensure a longer resorption time of up to 38 weeks. Mem-Lok Pliable is a conformable collagen membrane made from highly purified porcine tissue with a high tear strength. The resorption time for Mem-Lok Pliable is 12 to 16 weeks. Both membranes are offered in three different sizes (15 × 20; 20 × 30 and 30 × 40 mm).