ASUS at its New York City event formally brought over its UX ultrabooks to the US. Now called Zenbooks, the 11.6-inch UX21 and 13.3-inch UX31 are fundamentally similar to the ones sold abroad and have very portable dimensions not unlike the MacBook Air both are based on. The two are no more than 0.67 inches thick and weigh either 2.4 pounds (UX21) or 2.9 pounds (UX31) through their brushed aluminum designs and uses of solid-state drives.
