MTM Survivor Dry Box - Water and weather resistant, they can be used to carry all types of personal and safety items such as medicines, first aid kits, flash lights, flares, ammo, wallets, snacks, rain gear, maps etc. Don't be caught without one-it is your survival kit. Features: built-in compass, signaling mirror, water resistant, tongue and groove O-ring design, triple latched for best possible seal, lockable, rugged construction, floats. The tongue & groove construction uses an o-ring for water-resistant dry storage The built in compass and signal mirror will always be there when you need it. Double padlock tabs. Small Dimensions: 9.75" x 7.75" x 2.8" Large Dimensions: 9.75" x 7.75" x 4.75"