BLL Ultra Lightweight Packable Backpack Hiking Camping Outdoor Travel Biking Foldable Daypack 20L DURABLE. Made with High Quality Water and Tear Resistant Nylon material. MULTIFUNCTION:Perfect for day trips, vacation, travel, day hikes, school, camping and shopping. LIGHT WEIGHT:Easy to folds up into small pocket;The Secret of Never Paying Overweight Baggage Fee! COMFORTABLE:Comfortable Breathable Mesh Shoulder Straps. Easy to Adjust the length and lock firmly. Measurement:15L---41CM*29CM*12CM/H16.14"*W11.42"*T4.72";