The Ewa-Marine DUS-2 Deep Water Pouch is designed to protect documents, passports, airline tickets, money, calculators, GPS, organizers and other small items. The Screw rail closing (used to close the under water housings for expensive television cameras) allows for safe and easy opening and closing of the pouch. It includes a lanyard for easy carrying and storage. It was designed for use under water to a depth of 328' (100 M).