We took a camping trip with these when the temp went down to about 32 degrees. My guys were snug and cozy. Our youngest son never even woke up during the night and we never heard a single complaint about it being too cold. Only downside is that the carry bags are very snug so a child would not be able to roll their own bags and stow them away. That has to be a grown up job. Overall – we’re big fans of these bags.