The new X Series is incredibly light and slim, weighing just 0.78KG (including battery). It's hard to describe just how elegant and slim this notebook is, the chasis measures no more than 13.9mm in width at any point across its body. It's so light that Sony is claiming the X series is the "world's lightest laptop." The VAIO X series notebook will be available from November 2009 priced at 1,299 for the basic model through to 1,899 for a 256GB SSD and 2GHz Atom Processor powered model.