supply of modern backpack bag:-1.size of bag-18 inch (height) x 13 inch (width) x 6 inch (breath). 2. fabric- camouflage 1000 denier waterproof pu-coated fabric. 3.this should be durable large-capacity pack. it should have interchangeable shoulder straps and waist belt for extremely comfortable during carriage. 4.the back pad plate should be slid up and down the stays and should allow precise adjustment to carriers back. the pad should lock firmly into place with a large hook and-loop patch for stability. 5.the material used for body should be 630-denier super pack nylon with fully taped seams and bar tack reinforcements and the material used for bottom, lid, and exterior pocket should be extra-rugged 1050- denier smooth nylon. 6.body contact surfaces should be covered with 3-d mesh for breathability. 7.it should have polyethylene frame sheet and twin aluminium for efficient load transfer to hips. 8.main compartment should be accessible via the top spindrift collars, a large vertical zipper, or a horizontal zipper to the sleeping bag compartment. main compartment should have a stretch mesh pocket and hose exit port for hydration system. 9.it should be designed to connect to the main compartment with the top of the sleeping bag compartment. 10.the front pocket (large) should be accessible via a full length side zipper or the outer spindrift collar. 11.should have two low-profile side pockets which can hold items when needed to retrieve quickly or quarantine from the main load (such as fuel bottles). the underside pocket in the floating lid should be fronted with mesh-reinforced transparent plastic for easy location of items inside. twin waist belt pockets should hold small items close at hand. 12. all exterior zippers should be weatherproof or flap protected. 13.should have shock cord attachment system for the use for gear. 14.compression straps should trim and stabilize the load. 15.should have twin stretch mesh water bottle pockets.