Monkey Paks SATISFACTION GUARANTEED If you don't love this small military backpack, return it and we'll refund your money!. MADE FROM HEAVY DUTY 600D WATERPROOF MATERIAL This military backpack is built to tough standards to take you where your mission demands. 5 SEPARATE COMPARMENTS with even more interior organization pockets means this tactical bag is easy to organize all your gear. PARACORD ZIPPER PULLS. Keep quiet with silent paracord zipper pulls on heavy duty zippers built to tough standards. WHY STOP TO SIP? With this hydration pack backpack, you can stay hydrated on the go! Just push to open and close and drink through the rubber bite valve.