product information Color style: as shown on the left Material: Nylon Size: Width 35cm, Height 49cm, Thickness 20cm Strap root number: double root Lifting parts: soft handle Outer bag type: Inner patch pocket Luggage shape: horizontal square Opening method: zipper Carrying system: air cushion strap Waterproof degree: waterproof Internal structure of the bag: zipper pocket, mobile phone pocket, documents Function: breathable, wear-resistant, shock-resistant, load-reducing Applicable scene: business travel Applicable gender: neutral / both men and women Features Breathable and adjustable shoulder straps relieve tension on your shoulders. Comfortable back airflow design with thick and soft multi-faceted well-ventilated padding provides maximum back support. Made of waterproof durable polyester fabric with metal zippers, ensuring safe and durable use on a daily and weekend basis. As a professional bag for office work, the backpack is great for college students boys, girls, teens.