Kind of and kind of not. The fabric I picked (Minkee dots because they are sensory happiness to me) is warm. You can do it with less warm fabrics. They still are warm but your body prefers the sensory stim over the heat and adusts. I may not stay fully covered with it in the summer (a lot of the time it just is over my abdomen to shoulders) but I do use it (and I sleep under several other blankets including down year-round---I really like weight). That's what we were taught in OT school and that's what has been true for me.

Last summer I had ankle reconstruction surgery and couldn't use it because kicking it would have been dangerous for I think 5 months and I missed it desperately. I have a smaller one that I take to the hospital or when I travel and I used it over my torso sometimes (and I was incredibly hot because I was in a huge cast for 2 1/2 months) just to try to get the feeling. I even liked the weight of the cast though to be honest although I was certainly ready to be out of the casts when the time was up.