Review on Amazon Essentials Stretch Quarter Zip XX Large Men's Clothing by Joe Jimenez

I'm 6ft 2in, 208lbs (broad shoulders, slim) and L makes a great base layer and I'll probably use it most of the time. I'd say it can be used as a single layer well into the mid-50s, although that estimate will vary from person to person. It also works over a tight-fitting, moisture-wicking layer for runs well into the mid-40s.