the macbook air, made for thinness, weighs , was the first macbook produced using a single piece of aluminum with apple's unibody technique. the computer has a glossy led backlit screen and a backlit keyboard, as well as a large trackpad that responds to iphone-like multi-touch gestures such as pinching, swiping, and rotating. with the release of mac os x snow leopard, the air's multi-touch trackpad also supports handwriting recognition of chinese characters.