Not too big for a short evening hike, not too small for a full day of scrambling and summits the Gregory Z 30 is just right, like the Goldilocks of everyday packs. Updated for 2014 to be 10% lighter than the previous model. Proprietary CrossFlo suspension system provides cooling airflow across the back without sacrificing load transfer. Ventilated, trampoline style backpanel automatically tensions and increases in stiffness as you add weight to the pack. Lightweight wire X frame provides superior load transfer directly to the lumbar pad and waistbelt dynamic yoke integrates the shoulder harness directly to the X frame for a perfect balance of flexibility and stiffness. Die cut foam on harness and waistbelt enhances breathability and cuts down on weight. Extended zippered top load access with exterior zippered top pocket. Front bucket pocket and dual quick access waistbelt pockets keep smaller gear organized and easily accessible. Features a hydration reservoir sleeve with port, as well as water bottle pockets on the sides. Side and bottom compression straps help reduce pack volume and secure your gear. Includes hideaway axetrekking pole loops with secure carry. Ideal for carrying loads up to 35 lb. great for a 1 2 night backpacking trip.