Marius, there was a thread here a while back about the difference between the Montane Litespeed type very light wind shirts and stretch woven soft shells.
Basically they have the same function but the soft shell woven type are nicer to wear all day, the others are handier to carry and wear when required.
http://www.outdoorsmagic.com/forum/forummessages/mps/UTN/23407/URN/5/dt/4/srchdte/0/cp/1/v/1/sp/
Should add there is a lot more choice since that thread but the basic decision between these two types is the same I think.
Peter has your nice orange Ready Mix gone to that great gear shop in the sky or does it still get the occasional trot out?
Edited: 06/03/2012 at 22:12