This photo backpack is a design much loved by outdoors and wildlife photographers because of its "butterfly" dual wing zip opening. This allows cameras and lenses to be stored and extracted from either left or right halves without allowing equipment in the other half to be exposed to dust or the elements. An abundance of adjustable divisions allows multiple internal configurations, including long telephoto lenses. Provision for carrying a laptop and/or tablet. Lots of accessory pockets. Carry-on compatible with most airlines.
Gura Gear created the original Bataflae design. The design was temporarily absorbed into the Tamrac brand as the G Elite series (this is the G26 - 26 litres capacity) before reappearing in a modified form in the current Gura Gear Kiboko Series.
There is a good detailed review of this Tamrac G-Elite G26 model is on the fstoppers.com website. It'll come up on a Google search but I'm not allowed by eBay to post a direct link.
This backpack is in good used condition, fully functional with no damage or significant marking. The water resistant zippers all work well.