Best twin mattress toppers

Start with the Viscosoft Select High-Density. A 3-inch memory-foam topper with a medium-firm feel — the sweet spot for most sleepers: enough cushioning to soften a hard mattress without swallowing you, and it holds up better than thin budget foam.

Who the others suit:

• Tempur-Pedic Tempur Adapt — firm support and premium foam if you want a denser, more supportive feel and don't mind paying for it.
• Sleep Innovations Dual Layer 4-inch — plush and deep; best if your mattress is genuinely too hard and you want a big change.
• SINWEEK 2-inch gel memory foam — a light, soft touch-up for a mattress that's only slightly too firm.
• Farm To Home cotton down-alternative — if you sleep hot or dislike foam's sink-in feel.
• Mainstays 7-zone foam — a basic, thin pad for a guest bed or dorm.
• Sleep Zone cooling topper — cheap and well rated, for a quick cooling layer.

Check the size before you buy: a few of these are twin XL or king, so match it to your bed.