Do cooling pillows really stay cool all night?

High-trust testers caution that 'cooling' is largely a surface effect. Bamboo/rayon covers and gel-infused foams feel cool to the touch and can delay heat buildup, but most cooling pillows warm up within 30–60 minutes of contact. Hot sleepers typically get better results pairing a breathable shredded-foam pillow with a moisture-wicking pillowcase.