Spenco® 2nd Skin® Blister Pads promote a scab free, naturally healed blister. A thin, sterile hydrocolloid pad and adhesive film stays in place up to 5 days. (Latex free) 5 – 1.5” x 2.4” Sterile Pads A hydrocolloid pad bordered by a thin film helps keep blisters from drying out, absorbs perspiration and helps promote a scab-free, naturally healed blister..