Ospreys Almos AG Backpacks have an incredible fit, comfortable ventilation and all the features you need for a week on the trail. Both sizes of hiking backpack feature a LightWire frame and an Anti-Gravity suspension with a continuous back panel of lightweight mesh for a contoured, ventilated comfort from harness to Fit-On-the-Fly adjustable hip belt. A removable floating lid can be replaced with a fixed FlapJacket to protect gear and minimize weight. Theres an internal reservoir that accommodates a hydration pack up to 3L, and a separate sleeping bag compartment with removable straps. Storage options include zippered hip belt pockets, tool attachment points, Stow-On-the-Go trekking pole attachment system and stretch mesh front and side pockets. Dual side compression straps keep everything tight, and the sternum strap is equipped with an emergency whistle. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Hiking Backpacks.