I bought these last time around and they’re very high quality. I wear them under mid-weight shorts for running. They’re warm enough down to mid-20 deg F, and work up to the high-30s with moderate winds (less than 15 mph) and light precipitation. If you’re using in colder/windier/wetter conditions, I would go up to the 3.0 leggings. Fit is true to size, I’m 5ft 6in 155lbs and medium fits perfect.