The Book Air is proof. It's designed around all-flash storage for better responsiveness and reliability. It features a trackpad with full multi-touch support. And though it's incredibly thin and light, its large battery gives you portable power. Chief among it was the precision unibody enclosure. That same engineering process comes to the  Book Air display. Just like the main enclosure, the display housing is crafted from a single piece of aluminum, with all the structural elements  hined directly into it. Total unibody construction means a less complex design with fewer parts. That makes  Book Air exceptionally thin and light, yet still durable enough to handle the rigors of everyday use.