MAIBU 40L Hiking Backpack Lightweight Waterproof Travel Daypack Packable Trekking Backpack for Outdoor Sports Climbing Camping Cycling Mountaineering Large CAPACITY(40Liters) and LIGHTWEIGHT(1.14LB): It's roomy enough for your hammock, change clothes, towel, umbrella, camera, laptop, journal, drinks, wallet etc. It has multi compartments, easy to keep all the things you need organized COMFORTABLE carrying system: 3D breathable honeycomb mesh, ventilated stress reduced EPE and anti-vibration EVA layer at the shoulder strap and back; provides breathability, comfort and toughness for people carrying it DURABLE and WATERPROOF: This Backpack is made with high quality tear resistant and water resistant nylon material, provides extra strength and long-lasting performance with the lightest weight possible, avoids stuff in the bag getting wet when it's rainy or something More FEATURES: reflective strip for more safety at night; side nylon webbing, design to fix the trekking pole; adjustable buckle to adjust shoulder strap for comfort; bottom and waistband buckle to ensure firmness; front small pocket for carrying small stuffs; two side pockets are good for holding water bottles and umbrellas; shoulder straps has a D-shape hook, in which small items can be linked to VERSATILE: Ultra-light, Ultra-durable, Ultra-awesome backpack; perfect for hiking, climbing, occasional travel, day-to-day use, pack beach accessories, suitcase alternative, storing diapers, college, camera compartment, camping and more, and great gift for everyone