

This might sound funny, but I swear the four walls help. When I lived right off the water a dehumidifier helped with the high-humidity. Black-out curtains help keep the sun out, but they also keep the sun out if you catch me. Outside of that, I’ve heard ventilation. Don’t forget to drink water, keep your electrolytes solid and take care of yourself.
My blackout curtains have white on the other side I am not sure much about the science behind them but they make it cooler in the summer and warmer in the winter. They’re quite dark on the inside. I got what I paid for. I don’t think all curtains are made equally.