Cold-weather adventures call for Smartwool's IntraKnit Thermal Merino Base Layer Bottom. As we get after it in plummeting temps, the merino wool's natural insulating and moisture-wicking properties keep us from neither catching a chill nor overheating, so we can stay in that happy medium as we summit the peak. Thankfully, merino also fights off funky odors, so if we work a little harder we don't have to worry about offending the rest of the crew at the end of the day.