Sea to Summit Big River 30L Dry Backpack

What Our Gearhead® Experts Are Saying:"I take the Big River 30L Dry Backpack anytime I know things are going to get wet, dirty, or hammered by the elements. The roll-top closure is super reliable, and the 420D fabric has survived bushwhacks, river slams, and rough cargo hauls without flinching. The harness is minimalist but surprisingly solid, and I love the lash loops for strapping it to boats or racks. It’s a bombproof pack for real adventure days."We grab the Sea to Summit Big River 30L Dry Backpack when our adventures demand absolute waterproof protection. Designed for heavy-duty travel—whether we’re pushing through rain-soaked forest, stowing gear on a raft, or navigating splashy river crossings—this pack seals out the elements with a dependable roll-top closure and fully waterproof construction. The oval shape loads easily, while low-profile handles make it simple to grab and go.Durability is at the heart of the Big River, built with abrasion-resistant 420D nylon and a triple-coated base that shrugs off rough terrain and relentless wear. Hypalon lash loops let us secure it to kayaks, bike racks, or additional gear, and the EVA foam harness adds just enough structure for comfort without compromising waterproof performance. When reliability matters most, this pack keeps our essentials dry and protected on every expedition.