40L Waterproof Dry Bag Backpack

COR Surf 40L Waterproof Dry Bag Backpack — Laptop Sleeve, Roll-Top Closure

More gear, same promise — if it gets wet, your gear doesn't.

Everything that makes the 25L a workhorse scales up in the 40L. Sonic-welded seams and a rolling hook-and-loop closure seal out water completely, and if the pack goes overboard it floats. At 40 liters there's room for multi-day trips, extended commutes, or any situation where you're carrying more than a day's worth of gear without sacrificing the waterproof protection that makes this pack worth owning.

The padded 11" × 14" laptop sleeve keeps your computer or camera gear protected from drops and impact, not just moisture. Mesh side pockets fit water bottles up to 32 oz — a step up from the 25L — and the top buckle strap handles oversized items strapped to the outside. The splash-resistant exterior pocket gives you quick access to the stuff you're grabbing constantly, though it's worth noting it's splash-resistant, not fully submersible — keep electronics in the main compartment when conditions get serious. The reflective strip keeps you visible on early morning or late evening rides.

At 2.6 lbs for a 40L waterproof pack, it carries more than most and weighs less than you'd expect. Padded ergonomic shoulder straps keep it comfortable whether you're grinding out a long commute or covering miles on the trail.

Available in Black, Green, Grey, Blue, and Camo.

Backed by COR Surf's warranty against defects in materials and workmanship.

Specs at a Glance

Capacity: 40L

Dimensions: 21" tall × 15" wide × 8" deep

Weight: 2.6 lbs

Waterproofing: Sonic-welded seams, rolling hook-and-loop closure — floats if dropped in water

Laptop Sleeve: Padded, 11" × 14"

Pockets: Mesh side pockets (up to 32 oz bottles) | Splash-resistant exterior pocket

Features: Top buckle strap | Reflective strip | Ergonomic padded shoulder straps

Colors: Black | Green | Grey | Blue | Camo

Price: $75–$80 depending on color

⚠️ Note on the exterior pocket: The splash-resistant outer pocket is not designed for full submersion or prolonged driving rain. Store electronics in the main waterproof compartment when conditions are serious.

The bottom line: Bigger capacity, same waterproof build — the COR Surf 40L is the pack for longer hauls, bigger loads, and days when the weather has no intention of cooperating.