Keeps my 18 month old nice and warm. His room gets pretty cool during the winter (about 60-62°F) so I’m happy to have found this sleep suit. I haven’t used the legs and just use it as a bag and it’s perfect. He stays warm but not hot. Just recently purchased another to have as a spare. My 3 month old uses one every night as well. I’ve washed and dried both multiple times and they still look new. Absolutely worth the money, highly recommend!