A low-key, warm base layer I've worn for sub-zero runs (with a t-shirt over it practically alone); even with 10 mph wind and sleet! The fit is as expected; At 5ft 8" with a 34" bust and 28" waist I got a small and given the compression there is some waist room but not much. I think UA offers other, uncompressed ("customized") base layers!
Gildan Performance Men's π Clothing and Shirts with Moisture-Wicking Polyester
44 Review
Men'S Regular Fit Short-Sleeve Dress Shirts By Allsense - Look Stylish And Professional!
41 Review
Van Heusen Traveler Stretch Men's Shirt
47 Review
π Nantersan Placket Raglan Tee - A Casual Must-Have
52 Review