Do cooling pillows actually stay cool all night?

Across the reviewers we read, most gel-infused memory foam cooling pillows feel cool to the touch when you first lie down but warm up after you've settled in. One specialist-community commenter on Reddit summarized it bluntly: the cooling layer feels great until you fall asleep, and by morning the effect has faded. Pillows with breathable covers and adjustable fill tend to manage heat better over a full night than solid foam blocks.