Backpacker April 08 says the Gregory Baltoro pack ...makes 50 pounds feel downright feathery.. For comfort-seeking adventurers, the Gregory Baltoro pack has an updated design to lighten your load and a pivoting suspension system for smooth ride. Response Active Fit Suspension system pivots to self-adjust its waistbelt to your hip angle system also pivots to mirror your body as it moves. Natural pivot control lets you automatically adjust the amount of movement. Cross-over compression straps and side stiffening panels distribute compression over a wide surface to stabilize partially full pack. Design offers three ways to get at your gear with top-loading, front zip and bottom zippered access to the main compartment. Hydration-compatible design features a reservoir sleeve and dual drink-tube exit ports for on-the-go hydration reservoir sold separately. 3-D precurved waistbelt and harness use dual-density foams laminated to the surface fabric, resulting in cushioning without pinching or binding. A molded composite framesheet with an integrated single 7001-T6 aluminum stay helps support heavy loads. Features side stretch pockets, dual waistbelt pockets and a hide-away water bottle pocket and stash pocket. Top lid pocket lets you keep compass, maps, small essentials or raingear close at hand. Large capacity front pocket has a water-resistant zipper. Rubberlike thermoplastic elastomer covers the bottom of the pack to provide long-lasting wear and waterproof protection from the elements. New 210-denier Double Diamond Ripstop high tenacity nylon body with 210-denier high tenacity nylon twill for strength, durability and lightness.