Mattress protector buying guide: types, fit and care
A mattress protector is a removable, washable layer that sits between your fitted sheet and your mattress. It stops sweat, spills and stains soaking into the foam or springs. For most people the best choice is a fitted, waterproof protector with a breathable top and a quiet backing, sized to the full depth of your mattress. If bed bugs or a dust mite allergy are the main worry, a zip-up encasement that covers all six sides is the better fit.
Why bother with one
A mattress can't go in the washing machine. Every night it takes in moisture from sweat, plus skin cells and whatever gets spilled on it, and once a stain reaches the foam it is very hard to shift. Many manufacturers' warranties also exclude mattresses that are stained or soiled, so a protector can matter if you ever need to make a claim.
A protector is also cheaper to replace than a mattress, which makes it the obvious thing to put on a child's bed, a guest bed or any bed shared with a pet.
What to look for
Waterproofing
"Water resistant" and "waterproof" are not the same. A water-resistant protector slows a spill down; a waterproof one has a membrane underneath (usually polyurethane, often shortened to PU) that stops liquid getting through. For children, pets, night sweats or a cup of tea in bed, go fully waterproof.
Noise and heat
Older waterproof covers used PVC or vinyl, which crackles when you move and traps heat. Modern PU membranes are thinner and much quieter, and when paired with a breathable top fabric they sleep far closer to a normal sheet. If you run hot, look at the top layer as well as the backing: cotton, bamboo blends and smooth knits tend to feel cooler than thick polyester quilting.
Fit and pocket depth
Most protectors are either fitted (like a fitted sheet, with elastic around the edge) or strapped (a flat panel held on with corner bands). Fitted ones stay put better. Measure the depth of your mattress before you buy, and if you use a topper, measure the mattress and topper together. A protector that is too shallow pulls the corners up overnight.
Allergens and bed bugs
A fitted protector covers the top and sides. A zip encasement wraps the whole mattress, including the underside, which is why it is the usual choice when bed bugs or dust mite allergies are the concern.
Washing
Check the care label before you buy. A protector you can wash at a higher temperature is useful if dust mites are an issue, and one that tolerates a low tumble dry is easier to live with in a British winter.
Types of mattress protector compared
| Type | Top surface | Waterproof? | Noise | Suits |
|---|---|---|---|---|
| Quilted (fibre-filled) | Polyester or cotton quilting | Sometimes; check for a membrane | Quiet | People who want a touch of extra padding and light protection |
| Terry towelling | Cotton loops | Usually, with a PU backing | Quiet, slightly textured feel | Children's beds, budget spares |
| Smooth knit or bamboo blend | Jersey, bamboo or similar | Yes, with a PU membrane | Quiet | Hot sleepers, light sleepers, everyday use |
| PVC or vinyl | Plastic | Yes | Rustles | Short-term or care settings where wipe-clean matters most |
| Zip encasement | Usually a knit fabric | Often | Varies | Bed bugs, dust mite allergy, sealing a new mattress completely |
Who each type suits
Quilted protectors are what most people picture, and they are easy to find at Dunelm, John Lewis and supermarkets. They add a little softness, but the filling can hold heat, and a quilted one without a membrane won't stop a spill.
Terry towelling is absorbent and hard-wearing. Parents of toddlers often buy two so one is always clean. The looped surface can feel slightly rough through a thin sheet.
Smooth bamboo and knit protectors are the ones to look at if you sleep warm or hate any rustle. Brands such as Silentnight, Simba and Panda all sell versions in the UK, as does Dosaze.
PVC has mostly been overtaken. It still has a place where a surface needs to be wiped down quickly, but few people would choose it for their own bed.
And encasements are more of a project to fit (you have to lift the mattress and zip it in), so they make most sense when you have a specific reason.
UK sizes
UK beds are sized differently from European and US ones, so check the protector is labelled in UK sizes:
- Single: 90 x 190 cm
- Small double: 120 x 190 cm
- Double: 135 x 190 cm
- King: 150 x 200 cm
- Super king: 180 x 200 cm
Depth is where most fitting problems come from. Pocket-sprung and hybrid mattresses can be deep, and a topper adds more on top.
Where the Dosaze protector fits (and where it doesn't)
The Dosaze™ Cooling Bamboo Waterproof Mattress Protector sits in the smooth, breathable group in the table above. It uses a patented bamboo-blended fabric infused with silver, over a 100% waterproof lining. The Glacier-pro™ bamboo fabric is designed to keep you cool and sweat-free, which is the main complaint people have about waterproof covers.
Other points from its description:
- It protects against allergens, bed bugs, dust mites and stains.
- The anti-microbial silver combats bacteria and is described as gentle on all skin types.
- A stain-repellent finish helps keep the mattress cleaner for longer.
- It is quiet and soft, without the crinkle of plastic-backed covers.
- A high-quality elastic band holds it in place.
It suits hot sleepers, couples where one person wakes at every rustle, and anyone who wants full waterproofing without sleeping on something that feels like plastic.
It is not a zip encasement, so if you are dealing with an active bed bug problem, a six-sided encasement alongside professional treatment is the usual route. It is also a protective layer rather than padding. If your mattress feels too hard or too soft, a protector won't change that; a topper such as the DreamAlign Pressure Point Relief Mattress Topper or, for a sagging mattress, the DreamAlign Firm Mattress Topper does that job. The protector then goes over the topper, so measure both together for depth.
Looking after a waterproof protector
Wash it before first use, and then every week or two, depending on how much you sweat and whether pets share the bed. A few habits help the membrane last:
- Follow the temperature on the care label.
- Skip fabric softener, which can coat the fibres and make the top less absorbent.
- Avoid bleach.
- Tumble dry on low or line dry, as high heat can damage a PU backing.
Owning two protectors means the bed is never left bare while one dries.
Frequently asked questions
Do I need a mattress protector on a new mattress?
Yes, a new mattress is the best time to start using one, before any sweat or spills have soaked in. Many mattress warranties exclude stained mattresses, so a protector helps keep it in claimable condition. Wash the protector before first use.
Is a mattress protector the same as a mattress topper?
No. A protector is a thin washable layer that guards the mattress against liquids, stains and allergens. A topper is a thicker layer, often foam, that changes how firm or soft the bed feels. If you use both, the topper goes on the mattress and the protector goes over the topper.
Do waterproof mattress protectors make you hot?
Older PVC and vinyl ones often did, because plastic traps heat and moisture. Modern protectors with a thin polyurethane membrane and a breathable top fabric, such as bamboo blends or cotton, sleep much cooler. If you run hot, check the top fabric as well as the backing.
How often should I wash a mattress protector?
Every one to two weeks suits most people, and straight away after any spill or accident. Follow the care label, avoid fabric softener and bleach, and dry it on a low heat to protect the waterproof layer.
Will a mattress protector help with bed bugs?
A fitted protector covers the top and sides, which can help keep bugs out of the sleeping surface. For an existing infestation, a zip encasement that seals all six sides of the mattress is the usual choice, used alongside professional pest treatment.
