Best heated mattress toppers

Start here: the Air-Lock Multi-Zone Heated Mattress Pad. It's the one I'd hand most people — a queen with separate zones so each side of the bed gets its own warmth, and the strongest owner feedback of the group. If you sleep hot or cold at different times than your partner, that split control is the whole point.

Who the others suit:

• Beautyrest Cotton Blend — the crowd favourite: a breathable cotton-blend top and the widest size range, so it's the easy pick for a guest room or a bed that isn't a queen.
• Four-Zoned Heated Mattress Pad — best for forgetful sleepers: four zones plus a timer and auto shut-off.
• Therma-Lock Sherpa Fleece — for cold sleepers who want a cosy, plush surface more than fine-tuned control.
• Vevor King — a plain, no-frills warmer for a big bed; fewer heat levels, so less precise.
• EMF-Free (King) — for anyone who wants to avoid electromagnetic fields and will pay for it; it's the priciest here and king only.

Check the size on each card before you buy — a few of these are twin or king only.