Feature: 1. It is a simple and stylish design bag,Suitable for High school ,college students and business men.The most fashion bag in 2017 Autumn. 2. Special points: - Integrated USB charging port - Illuminating safety strips - Weight balance - Luggage strap - Adjustable open angles - Advanced storage design - charging port - music port - anti-theift - reflective strip - large capacity - Ergonomic design 3. Structure:laptop,computer,mobile phone,books,mazgines,sandwich,purse,wallet etc You can hide the card in the backpack shoulder strap. 4. Shipping fast. Capacity:35L-55L Color:Black,Grey Size:46cm X 30cm X 15cm Material:Canvas Functions:Wear-resistant,off-load,anti-theft,breathable,safety strips Weight:about 0.7kg