Now come on, at least make an effort! Thats a waterproof 
(The Acellero/Gamma LT would be the plausible options from the dead bird range.).
Really though, microlight should easily cope with 10kg packs without stress in terms of abrasion. Any loose velcro on the pack or such like?
(Twice as much abrasion resistance as the heavier equilibrium on Montane's Dyno say. Mine coped with a rather heavier pack than 10kg - and snagging on barbed wire - without damage.).
Its not terribly easy to get noticeably heavier/more durable while staying a pure wind shirt. Mostly ~300g+ which rather changes the use scenarios a little.
Paramo's various options (different fit to Montane!), or maybe Cioch for the tailoring or thin softshell stuff like Haglof's Lizard pullover/RABs Sawtooth jacket which are still light enough to carry. Buffalo's wind shirts are sort of in between I suppose.
Edited: 13/05/2012 at 09:22