I've been a huge fan of Carhartt bags. I use their standard work pack for my work laptop. Very sturdy material, water resistant. I use this as a gym bag. Big enough to fit shoes, towel, change of clothes, etc.
The company has free replacement for damaged bags if you contact Carhartt directly. My backpack ripped on the inside, and they quickly replaced it for free. Bought this bag based on my experience with the prior so I know what to expect from them.
The Carhartt Trade Series 2-in-1 Packable Duffel with Utility Pouch is a versatile 2-in-1 bag made of sturdy poly with Rain Defender durable water repellent. The Duffle-in-a-Pouch features an exterior zippered pocket for access to items that require quick access, and a removable, adjustable, padded shoulder strap. It comes folded inside a handy, drawstring utility pouch that can be used separately to hold tools and supplies. The Carhartt Trade Series 2-in-1 Packable Duffel with Utility Pouch features YKK zippers, metal hardware, rugged comfort-grip haul handles, triple needle stitching, and the Carhartt logo patch. The Duffle-in-a-Pouch measures 21.5w x 11h x 11d inches, and weighs 0.7 pounds. Like all Carhartt Work Bags, Packs, and Gear, the Carhartt Trade Series 2-in-1 Duffel in a Pouch is covered by a limited warranty against manufacturing defects in materials and workmanship for the normal life of the product.