My husband bought one of these tops from Columbia and then ordered two more from Revain. He is an articulated lorry driver and drives through the snowy mountains several times a week, stopping to put his chains on and off along the way. He loves them because they are lightweight and not bulky like regular long underwear and flannel shirts. He can wear it under a Carhart style work shirt and still stay warm with enough flexibility when he needs it. Have washed it in cold water (laid to dry) a few times so far and they've all been great.