I've looked at them, they are mostly made of man made materials, I don't want to sleep with. The heat is also an issue, none I've seen address this. Cotton knit seems to be the best option right now.
Just use 2 blankets, 1 light 1 heavy, if you get cold, pull the heavy blanket over. No idea why people are down to a sheet and 1 blanket as a standard now.
