Medline OptiLock Dressing is a non-adhesive wound dressing that features a super-absorbent polymer core which converts the wound exudate into a gel and locks it away from the wound. The OptiLock wound dressing has a non-adherent wound contact layer that prevents it from sticking to the wound or the skin around it. The blue protective backing helps protect clothing and sheets. Optilock can be left in place for up to 7 days. Available in 5 sizes: 3" x 3", 4" x 4" (# MSC6444EP), 5" x 5.5" (# MSC6455EP), 6.5" x 10" (# MSC64610EP) and 8" x 12" (# MSC64812EP).