When you're going to be out all day, or even when just one day in the wild isn't enough, carry your necessities up the trail in the Gregory Z 30 Backpack. It's a breeze literally in warm weather, thanks to the updated CrossFlo suspension system features a perforated frame sheet and a mesh back, shoulder, and waist belt to increase airflow. The high quality ripstop nylon combines durability and low weight speaking of weight, this model is 10% lighter than last year's version. The interior sleeve with a hydration port and side mesh bottle pockets store lots of water to keep you lubricated on long days in the woods reservoir not included. For organization, you'll find a large outer bucket pocket, a top zippered pocket, and hip belt pocket keep smaller items within easy reach. Side and bottom compression straps stabilize your load when the bag's not full, and an integrated rain cover stands at the ready in case of rain.