The Patagonia 70L Black Hole Wheeled Duffel Bag is made of burly recycled polyester ripstop with a matte, weather-resistant recycled TPU-film laminate for holding up against tough travel. A large opening to the main compartment, a zippered external top pocket, and mesh pockets in the lid that fit smaller items makes packing up simple yet organized. Reinforced lash points and top haul handles for multiple ways to carry and a stout wheelset make for smooth, comfortable travel; backup wheel axles are included and allow for on-the-go fixes (spare axles stored in the frame). The internal compression straps help secure contents during transit or cinch down items so you can fit extra gear. The internal frame collapses for out-of-the-way storage between trips.