Sea to Summit Lightweight 13L Dry Bag, Surf Blue, Large, A4005-36

It's flexible in both senses of the word- soft and pliable and ideal for many different uses. Made from a bluesign approved recycled 70D nylon with a C0 non-PFC DWR finish the interior polyurethane coating is white to improve visibility and make it easy to find small items in poor light.