Sea to Summit Big River Dry Backpack

The Sea to Summit Big River Dry Backpack is a roll-top waterproof backpack built from rugged 420D nylon with a white interior liner that makes it easier to spot gear at the bottom of the bag. The 30 L version weighs 670 g, and the range runs up to 75 L for longer trips; an adjustable EVA harness and removable hip belt carry the load once the roll-top is sealed. It is built for travel in the broad sense - kayaking, rafting and motorcycle touring - rather than dedicated backpacking, so expect a burlier, less structured carry system than a trekking pack of the same volume. The roll-top keeps contents dry when the bag is dropped in a boat bilge or strapped to a motorcycle in rain, and the removable hip belt means it can also be carried as a simple dry bag when you don't need the harness.