I purchased these sweatpants with the intention of using them for my workouts in the winter seeing as how the walk from the car to the gym's front door is usually a bit chilly. I had these pants shipped to my office and as soon as I opened them and felt the inside I wanted to put them on and go to sleep. The inside is a very soft fleece material that is also very warm. The fit is spot on. I'm 6 ft. 185lb with a 32-33 waist and the medium is perfect. As some other reviews said the crotch of these pants may be a little long but it does not bother me. I've worn these around the house for a few days now and they are very comfortable. Today will be my first workout in them and hopefully they don't make me feel like a lazy bum in the gym.

*Update*
Well I had my workout in these sweatpants and let's say they did justice to their name. These are way too warm to be comfortable for a workout. My bottom half was sweating badly in these and I was not doing cardio and I'm not even a heavy sweater. I still like these pants very much but they will not be used for anything other than lounging from now on.