In short, a trimmed but just as durable version of the larger Boblbee 25L, with a sharper design of our patented protective hard shell. Simple and elegant, the Boblbee GT 20L lies close up against your back for an extremely comfortable fit. WHY CHOOSE A BOBLBEE PACK? Got your Back! - Licensed at CE-Level 2 with the highest ratings of back protection in the industry.Got your Gear! - This pack offers world-class armor for your gear. We want you to stay active - all the while knowing that if you hit the pavement you and your electronics will be as safe as possible.Ergonomics - The unique shape is not only for looks. In addition to making the back protection possible, it also provides great lumbar support. Packing high in combination with the lumbar support most of the weight is spread out across your back and does not hang on your shoulders.