Foldable Lightweight Hiking Backpack - 20L Waterproof Daypack, Unisex Travel - Ultra Lightweight Carrying Daypack Product Description 1. Foldable hiking backpack is designed for travel and daily use with abrasion and water resistant polyester fabric. 2. Ultra-lightweight at 4.2 oz. The hiking backpack unfolds to 16" x 9.4" x 6.2" and has a loading capacity of 20 liters. The main pocket is large enough to hold 20L of stuff. The outer pocket is a quick access and the inner pocket doubles as a storage pocket, ideal for storing valuables. Two large side mesh pockets for guide books, water bottles or umbrellas. 3. Waterproof polyester fabric keeps rainwater out and prevents infiltration. Waterproof quality zipper with waterproof tape. 4.The backpack has a water bottle buckle (random color), which is convenient for carrying water bottles and saves space. Specifications Fabric. Polyester Size: 16in high x 9.4in long x 6.2in wide Folded size: 4.7inx 2.7in Capacity: 20L Color: blue Weight: 4.2 oz Package: 1 foldable backpack +1 storage bag+ 1 water bottle buckle