Nylon Imported Zipper closure ???LARGE CAPACITY(30L) and LIGHTWEIGHT(15oz)??: Backpack unfolded size: 52x28x16cm, Folding Size: 18x15x15cm, about 30 liters. Help your stuff stay organized. Main pocket is large enough to carry what you need when you are in outdoor or travel. ???BACKPACK STRUCTURE??: In total 6 Pockets in VEVESMUNDO backpack. Two large side mesh pockets for water bottles or umbrella. On the top and bottom both have pockets. The front zipper can be accessed directly into the main bag and there??s a hydration pocket in the main bag(Not include a hydration pack). ???BREATHABLE, RAINPROOF, DURABLE??: Made of high quality, waterproof, tear-resistant Nylon material. Breathable tear-resistant nylon for comfortable use. Notice: Please do not expose it to heavy rain for a long time! ???AVAILABLE FOR ANY OCCASION??: The backpack is perfect for day-to-day use or day trips, outdoor sport, vacation, travel, day hikes, school, camping, and great gift for everyone. This backpack is perfect suitable for any weather anywhere. ???MONEY BACK GUARANTEE??: If you are unhappy with our backpack for some reason, just return it within 365 days for a full refund.