Plano's Guide Series™ waterproof cases are the best protection on the water. Cam-action latches and a Dri-Loc^® O-ring seal provide an airtight, waterproof environment so your valuables can travel with you worry-free. Even if they go overboard, contents stay safe in one meter of water for up to 30 minutes. This 3400 size is great for small essentials like wallets and car keys.