features a zippered pocket for additional accessories and a strap to hold your headset firmly in place. With ergonomic shoulder straps and a padded mesh back panel for airflow, you can carry everything comfortably. Specifically designed for travel: Conveniently designed with a trolley handle pass-through to stack on top of luggage. 400-piece gaming backpack for HP Pavilion Get to your equipment. Anywhere is acceptable. The HP Pavilion Gaming Backpack 400 is made for gamers who want to play wherever they are. It has a waterproof outer shell, a snug fit, and roomy pockets to hold all of your gaming accessories, including laptops up to 15.6" (39.62 cm) in diagonal length.