Pack anything from the essentials to a weekend's worth of cabin worthy clothes into Osprey's Escapist 32 Backpack and go mountain biking. Its BioStretch harness adjusts the mesh lined, padded shoulder straps and waist belt for a personalized fit, and the AirScape back panel ensures ventilation. There's an external hydration sleeve for your own reservoir, and a removable rain cover inside the bottom compartment. You can also use the bottom compartment to separate dirty shoes from clean clothes, and there are stretchy pockets at the front and sides to stow water bottles and rain shells. The zippered front pocket is perfect for tool kits, and the zippered top protects your sunglasses while the shoulder pocket stores your smartphone.