Hi Stuart
Yeah, that's the #1 problem – which is why I make our own clothing. You just can't buy good stuff any more. Actually, our Taslan clothing was originally bought from Macpac as Rockover trousers and Windshirts, but Macpac discontinued both products. They don't make any shirts these days, and their current 'Rockover' trousers are more for fashion than the bush.
The Railriders gear is tough all right, but I tested some bits and found many problems with them. The trousers were strongly oriented towards street wear, and had zips and huge buttons underneath the hip belt – most uncomfortable. The fabric tended to be rather breezy too – not good in cold weather. Designed for the dry USA summer I think.
Their shirts may be OK in some areas, but they offered little or no protection against the wind. Many of them have mesh panels which are quite breezy – OK in the heat but not in the cold. Again, designed for the dry fine USA summer.
The GoLite Wisp was carried in France as the lightest alternative shirt I could find. It did offer some added wind resistance over my Taslan top, but it also allowed us to have something to wear in the evenings if staying in an up-market Refuge (or cheap hotel). And I could wear it while putting the rest of our clothing through a laundromat!
The Cocoon tops were very nice in the tent in the evening – it got quite cold (snow) sometimes. But we *never* wore them under a pack – that would wreck them. We might manage without them for a night or two, using our sleeping bags as wraps (shawls), but remember that trip was 3 months long. So yes, you certainly could manage with less under the *right* conditions for short trips.
You could grab some very cheap nylon track pants from a discount sports store and rip the cotton knit liner out. That would be close. Dunno what to recommend about the top though – maybe a Wisp or a Montane Lightspeed, but neither are as good as Taslan for rough stuff.
Cheers