BAG SIZE: 40*30*8CM Backpack structure: 1: There is a portable webbing for easy carrying; 2: The shoulder strap has a water outlet. This backpack can hold water bags to facilitate drinking; 3: Two-way zipper head; 4: Breathable S-shaped shoulder strap; 5: Water-proof fabric, durable; 6: Carry reflective strips to make your walking safer at night. Perfect Companion for Trips; This small daypack is the perfect companion when you are out. Perfect for day trips, travel, day hikes, school, camping, and shopping Keep Things Organized;One main pocket is Large enough to carry what you need on the trip. The other pocket is great for quick access such as cash, credit cards, and passport. Two large sides mesh pockets for water bottles or umbrella Occasion; Suitable for day trips, day hikes, daily walk-around, cycling, cruise, excursions, sports, camping, and shopping