Royal Mark 19 inch Voyager BPT113 Backpack: 100% Polyester with Iron Trolley System, Skate Wheels, Stylish Nylon Zipper - Explore in 5 Chic Colors: Black, Black/Green, Black/Grey, Black/Navy, and Black/Red.

Water Bottle Pocket
The external pocket features an elasticized mesh pocket, which expands to secure various-sized water bottles for convenient access.

Compression Strap System
Designed to adjust backpack volume while securing contents and preventing unwanted vibration

Organizer
The interior pocket organizer provides mesh dividers for pens, pencils, cellphones, CDs, and a detachable key fob.

Audio Interface
Internal pocket includes special PO to secure and hold CD or MP3 play with an external headphone port.