MP UK
2026-01-01T18:06:51+00:00

How to Wash Mattress Protectors: Complete UK Care Guide 2026

A good mattress protector is one of the best investments you can make for your bed — but only if you wash it correctly. Wash it wrong and you risk shrinkage, loss of waterproofing, and a lumpy, misshapen protector that no longer does its job. This complete UK care guide covers everything you need to know about washing, drying, and maintaining your mattress protector in 2026.

How Often Should You Wash a Mattress Protector?

As a general rule, wash your mattress protector every 1–2 months under normal use. However, you should wash it more frequently if:

You sweat heavily during the night

You have allergies or asthma — see our guide on mattress protectors for allergies

You have young children or pets sharing the bed

There has been a spill or accident

You use a waterproof pillow protector — these should also be washed monthly

Step-by-Step: How to Wash a Mattress Protector

Step 1: Check the Care Label

Always check the label first. Most UK mattress protectors — including our soft luxury quilted mattress protector and waterproof breathable protector — are machine washable at 40°C or 60°C. Never ignore the care label as high temperatures can damage waterproof membranes.

Step 2: Pre-Treat Any Stains

For stains, apply a small amount of mild liquid detergent directly to the affected area and gently work it in with a soft cloth. Leave for 10–15 minutes before washing. Avoid bleach as it can break down waterproof coatings and damage fibres.

Step 3: Machine Wash on the Right Setting

Temperature: 40°C for regular washes; 60°C for a hygiene wash (check label first)

Spin speed: 800–1000 RPM — avoid high spin speeds which can damage the waterproof layer

Detergent: Use a mild, non-biological liquid detergent — avoid fabric softener as it clogs the waterproof membrane

Load size: Wash alone or with similar items — don't overload the drum

Step 4: Rinse Thoroughly

Run an extra rinse cycle if your machine allows it. Detergent residue left in the protector can reduce its breathability and waterproofing over time.

Step 5: Dry Correctly

This is where most people go wrong. Always:

Tumble dry on low heat if the label permits — high heat damages waterproof membranes

Air dry flat if possible — lay it on a clean surface or hang over a clothes airer

Never dry in direct sunlight for extended periods as UV can degrade fibres

Make sure it is completely dry before putting it back on the mattress — a damp protector can cause mould

Can You Tumble Dry a Mattress Protector?

Yes, most mattress protectors can be tumble dried — but always on a low heat setting. High heat is the number one cause of waterproof membrane damage and shrinkage. If in doubt, air dry instead.

How to Wash Different Types of Mattress Protectors

Waterproof Mattress Protectors

Our waterproof mattress protectors and terry towelling waterproof protectors have a special membrane that repels liquid. To preserve this:

Never use fabric softener

Wash at 40–60°C maximum

Tumble dry on low or air dry

Re-test waterproofing after washing by dripping a few drops of water on the surface — they should bead up

Quilted Mattress Protectors

Quilted protectors like our soft luxury quilted mattress protector can be washed at 40°C. Shake well after washing to redistribute the filling evenly before drying.

Fleece & Thermal Protectors

Our thermal fleece underblanket should be washed at 40°C on a gentle cycle. Tumble dry on low and give it a good shake to restore the fleece texture.

Common Mistakes to Avoid

❌ Using fabric softener — blocks the waterproof membrane

❌ Washing at too high a temperature — causes shrinkage and membrane damage

❌ High spin speeds — can distort the shape and damage stitching

❌ Putting it back damp — leads to mould and mildew on your mattress

❌ Washing too rarely — dust mites and allergens build up quickly

How to Know When to Replace Your Mattress Protector

Even with perfect care, mattress protectors don't last forever. Replace yours if:

The waterproofing no longer works (water soaks through rather than beading)

It has permanent stains or odours that won't wash out

The filling has become lumpy or uneven

The elastic has lost its stretch and it no longer fits snugly

When it's time for a new one, browse our full range of mattress protectors — all designed for easy care and long-lasting performance.

Related Guides

How to Choose the Best Mattress Protector

Waterproof Mattress Protector Benefits

Mattress Protectors for Allergies: UK Guide

Best Mattress Protector Materials Compared

Do I Need a Mattress Protector?