Adventure Medical Ultralight / Watertight .7 First Aid KitUltralight Watertight . 7 First Aid Kit Repeatedly tested and approved by professionals, the Ultralight Watertight . 7 medical kit contains the first aid supplies you need in a kit that keeps water and the elements out. This compact kit weighs a mere 5. 8 oz., yet contains the outdoor first aid essentials needed for 1 2 people traveling on 1 4 day trips, including supplies to immobilize fractures, close wounds, and treat blisters. Two layers of