The perfect base layer for cold endeavors, cold climes, with or without exertion therein. 100% Merino wool, so soft and comfortable, you'll be looking for excuses to go out and shovel the driveway.  This is Smartwool's warmest weight bottoms, with a covered elastic waistband and flatlock seam construction to keep you comfortable. Black, Charcoal Heather and Olive Heather.