The Atwater Carey "Light & Dry" LD4 was specifically designed to provide comprehensive solutions to the most common minor first aid needs. The unique, outer bag of the kits is constructed of 1.3-ounce silicone impregnated nylon and features a safety-yellow color for unmatched visibility. The inner bags, which hold an abundance of first aid components, incorporate a patented double-track zipper with a vapor barrier. Each inner bag is guaranteed to provide leak proof protection, making Light & Dry an ideal kit for kayaking, canoeing, boating and other outdoor activities where water is a concern.