Backpack made from 1680 ballistic material for durability. Hard shell-protected instrument pocket as well as impact-resistant polymer base protects the contents from water and dirt as well as allowing the backpack to stand up. Features 48 pockets, extra back padding, chest strap, attachment strap for rolling bags and heavy duty harness for jobsite comfort. Compatible with the Packout modular storage system. Plastic Construction Plastic Base Zipped Opening 48 x Pockets Including Hard-Shell Protected Instrument Pocket Shoulder Strap & Handles Impact-Resistant Polymer Base Plastic Construction Plastic Base Zipped Opening 48 x Pockets Including Hard-Shell Protected Instrument Pocket Shoulder Strap & Handles Impact-Resistant Polymer Base