From Manufacturer
The black Glass Limo Backpack from ThinkTank is specially designed to hold long lenses. It accommodates a 600mm f/4 or a 500mm f/4 without a body attached or a 400mm f/2.8 with a pro body attached. The backpack has a padded collar for stabilizing a 300mm or similar-sized lens. When using the pack to carry a larger lens, the padded collar must be removed or the lens won't fit properly. The pack can be reconfigured to hold a standard DSLR and up to 8 lenses. The interior touch fastened dividers are removable and adjustable so you can customize the pack to suit your needs. In order to secure a long lens in place, the pack comes with a specially designed touch-fastening collar.
A zippered front organizer pocket stores pens, a hard drive, a note pad, and other small items. Your tripod or monopod can be attached to either side of the pack using the included straps. And, because ThinkTank knows that a day in the field can be rough, water bottle pockets are included on both sides of the pack.
The Glass Limo is carried by its adjustable harness or top carry handle. A waist belt is also included for balance and stability. The Glass Limo accepts ThinkTank's optional Pro Speed Belt or up to three optional modular pouches. A rain cover is included for protection in wet conditions.
The pack is made from a combination of durable water repellent fabric, polyurethane, nylon, and ripstop polyester. The interior has a polyethylene board with removable closed-cell velex foam and nylon. The YKK zippers have pull tabs and are designed to stay closed so your gear won't slip out.