Excellent base layer for all sorts of activities - Smartwool Merino 250 Baselayer Crew - Men's

I've acquired a few of these 250 base layers now and its my go to piece in cool and cold weather. I use this layer for late fall/winter cycling. Learned my lesson the hard way wearing a cotton long sleeve shirt and a nylon jacket. It was around 20-25F and windy and I was sweating and freezing at the same time. Not fun at all when you're miles out from home base. No longer an issue with this 250 base layer and appropriate breathable/vented jacket. Does a great job keeping your core temp regulated. I'm 6'0" 220 lbs 38" waist, 44" chest, athletic build and a large fits well as intended for a base layer. The 250's run a bit larger/longer than the equivalent 150 base layers.