ConvaTec AQUACEL Foam Dressings features an absorbent foam pad that absorbs wound exudate. The interface gels upon contact with the wound exudate with creates a moist wound environment. Another key feature is that it has a waterproof barrier that allows the user to shower and bathe. ConvaTec AQUACEL Foam Dressings features an absorbent foam pad that absorbs wound exudate. The interface gels upon contact with the wound exudate with creates a moist wound environment. Another key feature is that it has a waterproof barrier that allows the user to shower and bathe. AQUACEL Foam Adhesive is made with a gentle silicone border which is skin friendly. Also available in a non-adhesive version. Adhesive sizes: 3.2" x 3.2" (#420804) 4" x 4" (#420680), 5" x 5" (#420619), 7" x 7" (#420621), Heel 8" x 5.5" (#420625), and Sacral 8" x 7" (#420626). Non-Adhesive sizes: 4" x 4" (# 420633), 6" x 6" (# 420635), and 6" x 8" (# 420637).