Mountainsmith AT55 Internal Frame Backpack

Astonishing comfort, bomb-proof construction and intuitive design make the AT 55 the perfect choice for serious through-hikers and weight-conscious backpackers.

• Extra-durable internal frame backpack with intuitive weight-dispersion design

• Adjustable shoulder straps with dual-density foam and molded air-filled foam back panel

• Pivoting waist belt and 4 load adjusters; expandable 2,899-cubic-inch compartment

• 2 pleated, angled 32-ounce water bottle pockets; hydration bladder pocket with exit port

• Comes in regular and large torso size; weighs 4 pounds, 2 ounces; lifetime warranty