3-Day Expandable Outdoor Large Backpack · Size: 15” x 21” x 8” – 13'',Main area expands from 5" to 10" to fit more gear3 Day Expandable Outdoor Large Backpack with Molle compatibility that allows customizing the pack for your needs.Main compartment expands an additional 5” to accommodate extra vital tactical gear to complete your mission. It expands from 39L to 64L.Side parachute buckles allow for tightening to provide a compact, easy to transport pack.The smaller pocket on the rear contains an organizer pocket inside.The back padding can carry a hydration bladder (bladder not included) inside the main compartment and has a hydration port. Muti-functional Backpack GOOD BACKPACK Good bag lots of space! Has a section for a water bag and the bag itself extended for more space. It doesn’t come with the shoulder pouch so you need to find one that fits Ready for travelling The quality was excellent and much better than expected. Rugged and good looking (just like me). This was definitely not a cheap knock off but a solid well made military style backpack. The pack was advertised as "water and tear resistant" and practical yet adorable Amazing capacit Needed something larger for men. This fit the bill. Plenty of room for 5 books and three more books. Also has my laptop water bottle and other things. I took of the belt from around the waist, which will come in handy later. Very well pleased. Zippers are great and the bag is made sturdy. You get what you pay First of all, this backpack is huge! Haha! I wanted one big enough for travel textbook, iPad, and other miscellaneous items. I definitely got what I paid for. People don’t know whether I’m going to travel or combat, but I don’t care! I love it FEATURE Double-stitched Nylon fabric The shell is tough and water-resistant and stitched with reinforced nylon threads. MOLLE SYSTEM Heavyweight MOLLE loops and webbing for attaching additional tactical pouches and gear Multiple Compartments Military backpack has 3 main multi-compartment and dual zippered closure pockets including interior zip pocket and mesh pocket for more storage options Expandable backpack WHEN FULLY EXTENDED; Capacity: 39~64 Liters.The collapsible and expandable design lets you adjust the pack’s size to fit your gear. Duffle Backpack Small Tactical Backpak Tactical Gym Bag Miramrax Travel Duffle Bag With Wheels Extra Large Rolling Duffel Bags for Ta... Gym Bag Add to Cart Add to Cart Buying Options Add to Cart Add to Cart Customer Reviews 4.6 out of 5 stars 472 4.5 out of 5 stars 103 4.6 out of 5 stars 472 4.4 out of 5 stars 33 4.6 out of 5 stars 94 Price $37.99$37.99 $29.99$29.99 — no data $95.99$95.99 $24.99$24.99 SIZE 45L 30L 25L 124L 30L