This is one of their "L.O.A.D" packs, which stands for Light Weight Open Air Design.  The main arm/sholuder straps have airflow holes in them to cool you off. You can also adjust the back around your waist and hip. The actual name is "the Circuit Breaker."

It is 20" long and 14" wide laying flat out of the box. The main compartment is about that size with a 2-3" gussett in the bottom and a hard back with a pocket in it.

The next section has two zippers for ease of use. It is also about the size of the pack with a gusset in the bottom, but no pockets.

The next compartment out, also with 2 zippers is about the same size, but more shallow. It has a piece of netting in it to hold things in place.

The next compartment out has one zipper and is only maybe 1/2 - 2/3rds as deep but has lots of pockets, including a zippered one in it.

Finally, there is a stretchy pocket with no closure that is about 8" x 8".

There is a nylon handle at the top and a plastic hand just below the outermost pocket.

This is definitely a camping pack, not a take your books to school one.

I don't have a scale, but it feels light for the size.

Along with this one, you also get a $50 gift certificate for whatever you need to fill it with when you take that first trip.  

Enjoy this high quality item from a local business.