Purchased these sheets for my son's bed. He loves them. They are soft and cozy. Just right for our AZ winter - warm, but not too heavy. I'm not sure if Heavyweight is the right description for them - but they have been perfect for us. We have a regular size mattress with a memory foam topper and they fit over them both just fine. We've washed them a couple times already and haven't noticed any excessive shed or piling. They just seem to get softer. Very happy with this purchase.