Not sure if there are other solutions out there but one thing we hated was touching those cold walls in the middle of the night/cold mornings. Definitely enough chill to wake you up. So i found these. They’re adhesive velvet pads, really thin and lightweight, they stick right into the wall and REALLY take the chill off the walls. For being as thin as they are, you’d be surprised at how well the work for this purpose. We lined the bed wall with them and barely even notice them during the day. Worth a look.