There is actually a move towards a combo material that is wool blended with some elastic type materials for outdoor clothing.
Thorlo uses it for their mountain climbing socks (I swear by those - not as big as kilt hose, but ideal socks for hiking) I want to get some T-shirts in this material for desert camping, as they are light enough for day wear but in the event of getting sweaty or wet they will keep me warm at night. The elastic or spandex blended in helps the wool retain its shape, and the wool of course does what wool does.