I put my smartwool in the regular cold wash (we do the longest cycle) and then hang the shirts on hangers, everything else gets draped over a rack. The kids' smartwool socks go in the dryer w/ everything else if my wife is doing the laundry but I put them on the rack if I'm doing it.

They all say dryer-OK but what can I say I'm going the better safe-than-sorry route. The 'lightweight' smartwool has held up for years under this treatment and doesn't seem to be showing any signs of aging. The 'microweight' I'm not so confident of its long-term prospects.

I have no idea of the mechanics/chemistry of smartwool's wash/dry-ability, whether it's the sheep or the postprocessing or what.