ALPS Mountaineering Wasatch 3900 Internal Frame Backpack Top loading, extendable top lid; Rain cover included; Front zippered pocket; Green polyester rip stop Access to main compartment from each side; Spindrift collar with draw cord Adjustable shoulder harness; Hydration pocket and port; Fully padded suspension Unique side compression strap system; Lower side bottle pockets Torso Range: 13" to 20.5"; Capacity: 3900 in (64 L); Weight: 3 pounds, 8 ounces