This Back pack has 3 full size compartments with full zippers, plastic compartments for ID, small compartments for pens, pockets in several sizes for objects & laptops that are also insulated with a soft fabric for protection with the equipment. Some smaller Pockets also have a mesh net w zippers for closure. The front of Bag: side invisible zipper. Two side compartments on each end to hold small cups/objects. Back pack straps: Are insulated & packed w xtra padding for comfort. A Security strap to go across the chest to help with the complete support of the back pack when traveling over a long period of time/miles. This will assist with support on your back & upper body. Back of Bag: Padding to assist with the weight of the bag & carrying product over long periods of time. This will assist your back with comfort and support . NWOT