Main Features:- Anti-theft design・ better to keep your valuables safe- Padded separate laptop compartment at the back ( fits 15.6 inch laptop )- Earphone hole designed for you to enjoy music- Ergonomic design with thickened straps・ handle and back can balance the pressure on your spine when you carry heavy loads- Made of oxford fabric and polyester・ durable・ lightweight・ and breathable- Water-resistant material for you to use it even in bad weather- Reflective strap can increase night safety