KOSOX Large 40L Travel Water Resistant Backpack/ Hiking Daypack /Climbing Backpack Sport Bag Camping Backpack Larger than other packable backpack! 40L! The backpack is made from highly Water and Tear Resistant Nylon material, provide strengthen and long-lasting performance with minimal weight. It's roomy enough for your hammock, clothes,towel, journal,Trekking Poles,and a couple beers if need be,etc Adjustable and breathable padded shoulder and strap to meet different requirements for both men and women Size: 20 x 11.8 x 8.66 inches (H x W x D).Capacity: 40 liters.1 Main Compartment, 1 Front Pouch, 1 Zipper auxiliary pouch, 2 Sports Bottle Holder, and Padded Backpack Strap with Chest Clip Waist tightening adjustment system and high-quality chest buckle make equipment more professional Ultra-light, Ultra-durable, Ultra-awesome daypack.Perfect for hiking,occasional travel,day-to-day use,pack beach accessories, suitcase alternative, storing diapers,college, camera compartment, camping and more,and great gift for everyone