mCover iPearl Hard Shell Case for 15.6" Dell Inspiron 15z Model 5523 Ultrabook laptop (Black) Made of USA-made high-quality translucent DOW polycarbonate material, which is shatter-proof and will protect your 15.6"(diagonal) Dell Inspiron 15z model 5523 ultrabook laptop all around. Designed to perfectly fit the 15.6-inch Dell Inspiron 15z-5523 series laptop and protect ALL corners. NOT compatible with 15.6"(diagonal) Dell Inspiron 15R, Inspiron 15, Dell XPS 15 or any other 15.6" Dell/non-Dell laptop. NOT compatible with 14" Dell Inspiron 14Z, Inspiron 14R or Dell XPS 14 laptop. Designed with Foldable feet at the rear bottom to let you type more comfortably. It also helps to prolong your HP laptop's life with BETTER heat ventilation from features like retractable feet and more wider ventilation slots. 2-piece light-weight (11 oz or 310 g) shell easily snaps on and off.