Marchway Floating Waterproof Dry Bag Backpack 5–40L

MARCHWAY Floating Waterproof Dry Bag Backpack: A Roll-Top Dry Bag for Keeping Gear Dry on the Water

The MARCHWAY Floating Waterproof Dry Bag Backpack is a roll-top dry bag built to protect your phone, wallet, clothes, and other essentials from water on active outdoor trips.

If you kayak, raft, canoe, or spend time at the beach and you want a simple, reliable way to keep your gear dry, this is the kind of bag that solves that problem without overcomplicating it.

What It Is and How It Works

A dry bag is not a regular backpack with a waterproof lining. It is a sealed sack. You load your gear, roll the top down several times, and clip the buckle. That rolled seal is what keeps water out.

The MARCHWAY uses a roll-top closure: roll the opening down three to five times, then buckle it shut. As you roll, air gets trapped inside. That trapped air does two things. It creates a pressure barrier that resists water intrusion, and it gives the bag enough buoyancy to float visibly on the surface if it goes overboard. That makes it easy to spot and retrieve in moving water.

One honest note on waterproofing: the MARCHWAY is designed for splashes, rain, rapids, waves, and wet conditions you normally encounter on the water. It is not intended for extended submersion. If you need something that can sit underwater for a long time, this is not that bag.

Sizes and How to Choose

The MARCHWAY comes in five sizes, and the right one depends on what you are carrying and how you want to carry it.

The 5L and 10L sizes carry cross-body on a removable, adjustable shoulder strap. That works well when you want the bag close and accessible on a kayak or paddleboard.

The 20L through 40L sizes switch to backpack straps, which distributes heavier loads across your shoulders rather than putting all the weight on one side. If you are portaging between water sections or hiking to a put-in point, that matters.

Every size folds down into its own compact pouch when empty, so it packs away without taking up much room.

Construction and Materials

The shell is PVC (polyvinyl chloride) tarpaulin, a material common in dry bags because it is flexible, tough, and naturally water-resistant. The construction is multi-layer, which adds resistance to tearing and abrasion, which is relevant when a bag is getting dragged over rocks or rubbing against the side of a kayak.

The seams are welded rather than stitched. Welded seams fuse the material together so there are no needle holes for water to pass through. The hardware, buckles, and straps are described as heavy-duty, and the stitching where straps attach is reinforced.

The bag weighs just under 11 ounces, so it adds almost nothing to your load.

Securing the Bag to Your Boat

A reinforced D-ring and strap let you clip or tie the bag to a kayak, raft, or canoe. This matters more than it might seem. If you capsize, a bag that is clipped in stays with the boat. One that is loose becomes something you have to chase downstream.

Who This Bag Is and Is Not For

The MARCHWAY is a practical, capable dry bag for recreational paddlers, beachgoers, and anyone who needs reliable splash and rain protection for their everyday carry items.

It is not a technical waterproof case. It does not have a hard shell, a pressure-rated seal, or a submersion depth rating. If you are a scuba diver looking for something to protect a camera system or sensitive electronics that might genuinely go underwater, you need a purpose-built underwater housing instead.

But if you are heading out on a river trip, a kayak day tour, a rafting run, or a beach day and you simply need your phone, cash, and dry clothes to stay dry, the MARCHWAY handles that job well across a range of sizes.