The recommended size on the chart will provide a light body hugging fit. If you prefer a slightly looser fit, choose a size larger. The boxer-briefs are not made of compression material, but do provide a close to the body feel.
“The problem with most undershirts is that they’re just T-shirts. UnderFit’s shirts are made from lightweight yet durable fabrics with a touch of stretch and are designed to be worn under your shirts.”
“Gotta tell you, it’s a very nice product. Good fit, good feel, good price. Comparatively, the UnderFit fits and feels very close (or as nice as) to the more expensive micromodal/lycra undershirts that are priced in the $30+ range.”