With your day or day and a half trek coming up, you will need a pack that you can rely on. The Synergy is exactly what every recreational hiker needs. Constructed of Nylon Ripstop fabric with a back that is fully padded and is supported with an aluminum frame and rigid PE framesheet it allows full range of motion with stability. A fully padded and contoured waist belt makes the pack carry great. The padded shoulder straps are curved and have a sternum strap to offer extra comfort and flexibility. The large main compartment has an oversized #10 zipper for long term durability and reliability. The double side compression straps keep your gear stable. There are two zippered side pockets to give you even more places to organize your stuff. The Synergy also offers a hydration pocket and port. A zippered map pocket is located behind the front fabric panel. The side mesh pockets hold water bottles, energy bars, or any small gear you need quick access to. Lower lash straps can hold a sweater or jacket. 2100 cubic inches at such a low price make the Synergy the ideal, high value day pack.