This pack is 5000 cu. inches, has an integrated rain cover and utilizes ALPS own Comfort Glide on the suspension. Mine (an 2003 model) is constructed of 300D "honeycombed"polyester ripstop. Has an PE framesheet to keep items from poking one in the back plus "air mesh" to keep the back cool.
The Cascade has three outside pockets for gear organization and two side mesh water bottle pockets. Top "lid "converts to an fanny pack.