REI CIMA 80 Internal Frame Hiking Backpack Small Torso Capacity and access: An 80-liter capacity designed for multi-day trips, with a U-shaped front zipper that provides clamshell-style access to the main compartment. Organization: Multiple pockets, including an internal mesh pocket for separating items, and external pockets for quick-access gear. Comfort and fit: An internal frame with aluminum stays, adjustable torso length, and a hipbelt with a quad-buckle and webbing cinches for a customizable fit. Hydration: A large internal sleeve to hold a hydration reservoir, positioned to keep the weight close to your back. External gear attachment: An external gear panel, sometimes called "The Gear Hog," with front flasher pockets for stuffing gear, along with daisy chains and dual ice axe/tool loops. Durability: Constructed from a combination of Spectra ripstop nylon and ripstop polyester for long-lasting wear. Compression: Compression straps help to secure the load and improve stability.