They're nice and light and perfect for the gym, and even aren't bad in warm weather. They feel more like pajama pants than sweatpants.

The one thing I don't like about them is that the pockets are slick and shallow, so things easily fall out of them when you're getting in and out of your car, for example. My phone and wallet have both slid out when getting out of my car on a couple of occasions, so you have to be careful when doing that. I wish the pockets were lined with grippy texture or were deeper. Other than that, these are great.