There are loads of precious and fragile electronics in our lives that require appropriate protection when used on-the-go, and therefore the range of gadget-tailored bags is pretty huge. If you need greater protection than a typical case provides, however, a hard shell-equipped backpack may be your best bet. Designed for heavy use, the Solid Gray backpack comes with a rigid body yet is lightweight at the same time, given that it's made from a single sheet of copolymer.

The most distinctive aspect of Solid Gray is its futuristic, armadillo-inspired folding design. The polypropene block copolymer shell is reportedly durable enough to withstand being repeatedly bended.

Solid Gray is equipped with a durable EPDM foam lining. The backpack has a main compartment that can fit tablets or laptops of up to 15.6-inch screen size, with straps holding the device in a fixed position. There are also two separate, smaller compartments that are reportedly suitable for carrying smaller items, such as smartphones, media players and other accessories. Solid Gray also features a foam-padded multi clip located inside to keep important documents safe, while its polypropylene latches keep the backpack locked.

Manufactured in the Netherlands, the Solid Gray backpack is up for sale on eBay for a price of EUR119 (around US$161.69). The version currently offered is white with black nylon shoulder straps, although Solid Gray's website also shows models featuring white straps and a gray body. A fluorescent yellow raincover is also available for another EUR10 (US$13.59).