I have a summer weight down blanket that is comfortable right now. I don’t do air conditioning so any blanket or cover is too much when it gets really hot but otherwise it is good. I have had it a long time and it was a gift but I saw some that looked similar when I searched.
Living in Florida year round I did away with blankets. I use a very thin, 100% cotton bedspread that serves as my blanket. I wash it when I do my sheets. It's very light and stays in place. I have an adjustable queen and bought a king size spread so it covers the whole bed. I've been using it for at least six years. I can't stand anything that weighs me down.