Largest of our Portage Pack series, the Trailblazer measures 2700 cubic inches (44 liters). The Trailblazer comes with all the extras - sternum straps, load lifters, back padding, and a waist belt. Each side of the bag features tall zipper pockets built to hold two 1 liter, large mouth water bottles. Along the front is another pocket with an opening which is covered by the bag's top flap to aid with water resistance and durability. Like all of our packs, the Trailblazer is made of a durable, water resistant, 1000 denier fabric that is built for adventure and longevity. Just a little larger than the Guide Pack, this bag would work well for a weekend-away or to take on a trip out of town.