Travel light and fast with the Ultralight/Watertight .5, which weighs only 3.6 oz. With enough first aid supplies for a pair of adventurers heading out for 1-2 days, this 100% waterproof kit is ideal for ultralight hiking, kayaking, climbing, skiing, and mountain biking. Adventure Medical Kits Ultralight/Watertight .5 Medical Kit - First Aid at Academy Sports