Slughaus - who are behind the Wolverine bag based on the Marvel superhero - say the shell they make the bag from is made of ultra-durable FuseFabric.
They wrote on their Kickstarter page: "We wanted to step-out of our comfort zone and test our abilities to create the best, most premium products. From that, WOLVERINE was born. We focused on a premium, lightweight, and minimal design, providing water-resistant seams and an ultra-durable FuseFabric shell. For optimum carry capabilities, we added a removable cross shoulder strap to simply throw over your shoulder. Simple, easy and effortless, we see things from a different perspective.
"Our FuseFabric technology vastly improves upon traditional Nylon Ripstop. It's a revolutionary weaving process that blends thicker, more-durable threads with lighter, lower-density fibers all coming together with a polyurethane coating. This effectively reduces overall weight and creating a seamless experience over all ... The roll top bag design allows for flexible storage capability. No longer will you have a floppy nor overstuffed bag ... The Wolverine packs down to the size of a cell phone at half the weight. Perfect add-on for more rigorous traveling that requires a flexible utility bag."
The Wolverine bag's tough nature means it can be used for a range of activities including hiking, surfing and climbing.
They added: "It holds up in all weather conditions and can be submerged at 1 ATM. It's protected against accidental exposure to water; for example, splashes, perspiration or accidental immersion. The simplest solutions solve the biggest problems. What makes us different? We eliminate weight, bulk, and hassle from standard everyday carry bags. We've created an effortless experience between you, and your EDC. The outdoors have never been so close. We designed Wolverine to be perfect for hiking, going to the beach, surfing, or climbing - you name it. Get out of town with the buddies, or explore the the endless trails of the outdoors, all with the convenience of your Wolverine."