R1 pullover? might save you some grams, otherwise any savings would be from a 'all in one' type insulation garment that would replace your 100 weight AND your other insulation, then bring something like a Cap3 for hiking in. Not the most versatile system though.
You could always just leave the fleece behind and deal with any suffering though. Either that or walk/run faster when you get cold <img src="/forums/images/graemlins/wink.gif" alt="" />
Cheers


Edited by robpatterson5 (12/05/08 02:59 PM)