Good Sleep Smart Mattress Topper Review
Quick answer: Good Sleep is a mattress topper with water running through it. A bedside hub chills or warms that water, so your bed stays at the temperature you pick. It's pitched as a lower-cost option for people who've looked at Eight Sleep.

Who it suits
Hot sleepers, couples who can't agree on room temperature, and anyone who wants temperature control without buying a whole new mattress.
Key features
- Two parts: a bedside hub (pump, heater, and cooler) and a topper that tubing connects to the hub
- Pick one fixed temperature, or use auto mode: it starts a little warm, cools down once you're asleep, then warms back up before you wake
- Fits over the mattress you already have and stays in place with corner straps
- Can cool or heat, so it works in summer and winter
Where to get it
Visit the official Good Sleep siteSee the Good Sleep topper product page
FAQ
Do I need a new mattress for Good Sleep?
No. The topper goes over your current mattress and straps onto the corners.
Can Good Sleep warm the bed as well as cool it?
Yes. The hub can heat or cool the water, and its auto mode changes the temperature through the night.