Solar Power Outdoor Charging Backpack with USB Port Waterproof Breathable

This is a backpack with many functions. It was waterproof, anti theft and the design accords with ergonomics, comfortable in the back, stylish and generous in appearance, which is the best choice for outside. 

Features:
It comes with USB function, offers a convenient charging for your electonic devices. 
It can hold basic thing that you needed for out, such as laptop, wallet, phone. 
Science burdened system, breathable and decompression. 
Waterproof and wearproof fabric. 
Removable solar panels for convenient wash.  

Specifications:
Color: red, blue, black, camel (optional); 
Capacity: 20-35L; 
Material: polyester, nylon; 
Item size: 490 * 350 * 180mm / 19.3 * 13.8 * 7.1in; 
Item weight: 720g / 1.6lb; 
Package size: 450 * 300 * 70mm / 17.7 * 11.8 * 2.8in; 
Package weight: 1210g / 2.7lb;  

Package list:
1 * Backpack