I've never seen the point in spending money on something to sleep in; a soft old cotton t-shirt and thrifted cotton pants were fine. But after a great experience with a merino undershirt, I decided to indulge and give this nightgown a try when it went on sale. I have worn it every night since, and wish I never had to take it off!!! It is unbelievably soft and comfortable; it is both warm enough to keep me totally comfortable in my chilly house (usually in the 50's at night, 65 during the day in winter) and cool enough that I am never sweaty or clammy, despite being at that time of life. It has actually made a difference in how well I sleep. Honestly, I wish I never had to take it off! I sized up to a large because I prefer clothes looser, and it's just right for me (I'm 6'0", 160 lb). I'm going to be getting this as a gift for my daughter and sister in the future, as well as some other pieces for myself. Absolutely worth every penny.