OptiLock Nonadhesive Super Absorbent Wound Dressings, 4"x 4", 1 Box of 10, MSC6444EPZ:. Uses:. Absorbs and locks in drainage. Partial and full-thickness wounds. Locks in drainage under compression. Protects skin from maceration. The non-adherent wound contact layer. Change frequency: up to 7 days. 4 in x 4 in Dressing. 3.3 in x 3.5 in pad. Latex-free. Sterile. Direction:. Remove OptiLock from the package. Place the white side of dressing on the wound. Use a large enough dressing to cover the wound and surrounding skin. Secure the dressing with tape or other secondary dressing such as the elastic net.