Waterproof packsacks are plentiful on the market, yet the Big River Dry Bag takes it a step further. The first thing that stands out is its oval shape, which serves a practical purpose as it prevents the packsack from rolling away. Another advantage is that it allows for better and more space-efficient stacking. The six incredibly sturdy side loops enable secure attachment of the packsack to a bike, cart, or boat, and additional gear can also be secured on the outside. The extremely robust, abrasion-resistant 420D nylon fabric can withstand weather conditions and rough handling – the material is virtually indestructible. Additionally, it is waterproof due to the TPU lamination – a water column rating of 10,000 mm makes a real statement. Like all packsacks with roll closures, the Big River Dry Bag is waterproof when rolled down three times, and on both sides of the sturdy field-repair buckles, there are D-rings to lock the sack with a padlock and to attach a separately available carrying strap. Another extremely helpful detail is the white interior color of the packsack, which significantly eases rummaging and searching.