The Gabbag Dry Bag 25L is a waterproof nylon bag. In this bag your belongings are protected against rain and splash water. You close the bag by rolling up the top. Roll at least 3 times for optimal protection against water. With the included shoulder strap you can easily carry the bag over your shoulder. Do you take the bag with you in case it starts to rain? The bag is easy to fold and fits in your pocket.