A pair of hiking pants which you can wear for 365 days and even sleep in which weigh 75 grams and a raincoat that you can ALSO sleep in @ 123 grams. That’s REAL weight saving: http://hikelighter.com/2012/01/26/montbell-dynamo-wind-pants/ & http://hikelighter.com/2013/11/07/zpacks-rain-jacket/
Update: I bought a pair of these as a dry change pair and for sleeping in – and they are fine.
Montbell also make a matching top which is unfortunately not available in my size, but in my wife’s size weighs about 50 grams! It is called the Tachyon (available in an anorak).
A change of clothes at under 200 grams!