It features a zippered main compartment with two zipper pulls. The front pocket contains two pen holders and a handy compartment for your cell phone. The two side mesh pockets are perfect for holding our Blue Lake water bottles! Extra padding on the straps and back provides comfort and support. Measures 12 1/2" x 18 1/4" x 6" when fully loaded.  Very good used condition. There are 2 zippered pockets - both zippers in good working order.  See photos for details.  There are a couple of marks that are pointed out in the photos.