u/Foreign-Actuary-5196

I get really cold when I sleep. I was wondering if anyone else who also sleeps cold has developed and ultralight system for keeping warm while going to hostels or other places where you can’t ask for more blankets. Sometimes I bring an ultralight sleeping bag but it’s so big. I was also thinking about possibly trying a hot water bladder. Any and all ideas / systems welcome just looking for suggestions on staying warm in bed with minimal volume / weight?