Hiday Ultralight Packable Backpack Handy Daypack with Anti Water Drop Design polyester Material: Constructed of high-quality polyester fabric, high performance for waterproof and tear resistant; Unfolded dimension: 39*47CM; Folded dimension: 18*14*6.5CM Extremely Foldable: Compacts into zippered inner pouch to fit everywhere Keep Stuff Organized: Two-Way zipper closure on main compartment; Small zippered pocket inside the pack; Front zippered pocket for items that needed to be easily accessible Ultra lightweight: The pockets design is simple, with no extra materials to increase weight, avoiding overweight charge Various Pattern: Perfect for biking, hiking, camping, day trips, school, vacation, etc