Boston Dry Bag in Black from Snow Peak. 

The Dry Boston Bag is a seamless weekend-style bag that features a main compartment, a front outer pocket and a removable shoulder belt. The size can be adjusted according to the contents.  Equipped with an air vent valve that also functions as a water drain. The new zip lock fastener attached to the opening makes it more waterproof and allows it to be closed without rolling and the waterproof zipper on the side allows for quick and easy access without opening the top.

• 100% Polyester
• W30×D21×H22(cm)
• Capacity approx 30L