Did my usual weekday workout today wearing these as a base layer under a thin pair of hiking pants. Rode my bike 2 miles to the park where I jogged 1.5 miles, and biked 2 miles home. The temp was in the mid 40s. This kept me warm enough when I was starting out, but didn't overheat once I really got moving on the run. They fit snug but not confining even when moving a lot.