40L - 64 L Outdoor 3 Day Expandable Tactical Backpack Military Sport Camping Hiking Trekking Bag School Travel Gym Carrier<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Size: 20 1/2″ x 15″ x 7 3/4″ - 12 3/4″ WHEN FULLY EXTENDED; Capacity: 39~64 Liters.; Weight：2.7 lbs</li><li>Constructed of 600 denier polyester with vinyl backing. External Molle loops allow additional pockets to be attached if necessary. Extra-Large expandable main packing compartment</li><li>Main area expands from 5" to 10" to fit more gear.The bag with 3 compartment for different function. An Organizer pocket has several mesh compartments built in. Side parachute clasps. Easy grip zipper pulls .Back support belt with parachute clasps</li><li>Whether it's a long hike， an overnight trip， or a weekend getaway，the Expandable Backpack will fit your needs</li><li>This backpack is designed to support all your outdoor adventure and hiking needs. It features and extra-large expendable main compartment to fit everything you need for a day hike， overnight or three trip. It can be compressed to 39 liters or expanded to 64 liters of carrying space. Side parachure claps allow for tightening to provide a compact ， easy to transport pack.</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41lbb0MkziL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41WcYvt-2ZL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41FQKpnnmML.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41V6P6X1rdL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51%2BPKqCg%2B1L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41F-Z7F1kLL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/515PSyKrwgL.jpg" noproxy>