You’ve finally got that king-size bed, and now you need to keep it in shape. A good mattress protector can double the life of your mattress, but with waterproof, breathable, and hybrid options from IKEA, Dunnes, Emma, and JYSK, the choice isn’t always clear. We compare the top contenders so you can pick the right balance of protection and comfort for your sleep.
Standard King Size Dimensions: 76″ x 80″ · Waterproof Protectors Share: ~80% · Average Price Range: $20–$60 · Typical Lifespan: 3–5 years
Quick snapshot
- 100% waterproof membrane (The Royce UK)
- Ideal for spills and accidents (The Royce UK)
- Requires breathable backing (The Royce UK)
- Natural cotton or bamboo top (Victoria Linen UK)
- Good temperature regulation (Victoria Linen UK)
- May not be fully waterproof (Victoria Linen UK)
- Easy to install (Dunnes Stores)
- Stretches over mattress corners (Dunnes Stores)
- Less secure than zippered (Dunnes Stores)
Here are the essential specifications for king size mattress protectors.
| Fact | Value |
|---|---|
| King Size Dimensions | 76″ x 80″ (Double XL also available) |
| Waterproof Claim | Most protectors use TPU or PU coating (The Royce UK) |
| Washable | Machine washable, typically cold water |
| Common Materials | Cotton, polyester, microfiber, bamboo |
| Fit Depth | Up to 35 cm (most models) |
| Washing Temperature | 40°C (Dunnes) / 60°C (IKEA) |
| Certification | OEKO-TEX (Emma) |
| Warranty | 5 years (Emma) |
What Is the Best King Size Mattress Protector?
Four brands dominate the UK market, and each takes a different approach to the waterproof-versus-breathability trade-off. Here’s how the top contenders stack up.
Top-rated brands
Five contenders, one pattern: the best protector for you depends on whether you prioritise spill protection, allergen blocking, or temperature neutrality. Sleepopolis (mattress review expert) rates breathable cotton models highest for comfort, while pure waterproof types score best for households with children or pets.
| Brand | Type | Key Material | Price Range (King) | Special Feature |
|---|---|---|---|---|
| IKEA PLATSEN | Waterproof encasement | Polyester + polyurethane | ~£20–£30 | Full zippered, dust mite proof |
| Dunnes Stores | Waterproof fitted | Polyester + TPU | ~£15–£25 | Elasticated corners, hypoallergenic |
| Emma Premium | Waterproof breathable | Recycled polyester + 3-layer | ~£40–£50 | Silent, breathable, recycled materials |
| JYSK | Waterproof quilted topper | TPU membrane | ~£25–£35 | Quilted comfort, corner straps |
The trade-off: cheaper protectors use a single waterproof layer that can feel less breathable, while premium three-layer designs from Emma and IKEA aim to balance both.
Customer reviews
On IKEA’s site, the PLATSEN protector earns high marks for its snug encasement, though some users note it can make the mattress feel slightly stiffer. Dunnes’ protector is praised for its easy fit and low price, but a few reviewers mention it can be noisy. Emma’s protector receives consistent 4.5-star ratings for being quiet and cool, while JYSK’s quilted option wins over customers who want extra padding.
The implication: your sleeping habits and household needs directly determine which protector type will serve you best.
Is a Waterproof Mattress Protector Worth It?
A waterproof layer adds essential protection, but modern materials have largely solved the old complaint about heat and noise. Here’s what you gain and what you might lose.
Pros and cons of waterproof
Upsides
- Blocks liquids completely – a must for spills and accidents (King of Cotton)
- Protects against dust mites and allergens when combined with a full cover
- Extends mattress lifespan dramatically
Downsides
- Older vinyl types trap heat – modern TPU or polyurethane layers reduce this
- Some budget protectors can rustle or feel plasticky
- Breathability still lags behind pure cotton options
Breathability concerns
Modern breathable waterproof protectors use a polyurethane or TPU membrane with a cotton or bamboo top layer to allow air exchange. Victoria Linen (specialist bedding retailer) explains that this design lets moisture vapor escape while still keeping liquids out – a critical feature for hot sleepers. In contrast, a purely breathable cotton protector will let a 250ml spill soak straight through, as King of Cotton (bedding expert) notes.
If you’re a hot sleeper with no risk of spills, a breathable bamboo or cotton protector might serve you better. But for most households, a high-quality waterproof breathable protector (like Emma’s) hits the sweet spot.
The pattern: the best choice hinges on whether you prioritise liquid protection or maximum airflow.
How to Choose a King Size Mattress Protector?
Getting the right fit and material means measuring your mattress depth and understanding the difference between fitted and zippered styles. Follow these steps to narrow the field.
- Measure your mattress depth: Most protectors fit mattresses up to 30–35 cm deep. Measure yours – common king sizes are 76″ x 80″ but thickness varies.
- Select the top layer material: Cotton is softest; bamboo offers natural cooling; polyester is durable but less breathable.
- Choose fitted vs zippered: A fitted protector (elasticated corners) is easier to remove and wash. A zippered encasement wraps the entire mattress top and sides – the gold standard for allergy and dust mite protection.
- Verify waterproof membrane: TPU (thermoplastic polyurethane) is quieter and more flexible than older PU coatings.
- Check washing instructions and certifications: All major brands recommend machine washing cold – hot water can damage the membrane. Look for OEKO-TEX certification to ensure no harmful chemicals (Sleepopolis).
Key features to consider
The five factors above cover the essentials, but also weigh warranty length (5 years for Emma) and price: you can spend anywhere from £15 to £50 for a king size protector.
Fitted vs zippered
The choice between fitted and zippered boils down to coverage. A fitted protector is easier to remove and wash, but a zippered encasement like IKEA PLATSEN wraps the entire mattress top and sides – the gold standard for allergy and dust mite protection.
If you have asthma or dust mite allergies, a zippered encasement is the only option that completely seals the mattress surface. For everyday protection from spills alone, a fitted waterproof protector is sufficient and easier to maintain.
What this means: your health concerns should drive the decision between convenience and full coverage.
Are IKEA Mattress Protectors Any Good?
IKEA offers two main types for king size beds: the PLATSEN waterproof encasement and the LENAST quilted protector. Both are available in the UK market and widely praised for value.
IKEA options
The PLATSEN model (180x200cm) uses a polyurethane coating on a polyester base and zips shut for full coverage. IKEA UK lists it as machine washable at 60°C, which is hot enough to kill dust mites. The LENAST is a cotton-blend quilted protector without a waterproof layer – for those who prefer natural materials and don’t need spill protection.
Customer experiences
Online reviews on IKEA’s site give PLATSEN 4.2 out of 5 stars. Users highlight the snug fit and silent fabric, though a minority note it can make the mattress feel slightly warmer. The LENAST gets slightly lower ratings for durability, with some reports of pilling after repeated washes.
What Are the Best Brands of King Size Mattress Protectors?
Beyond IKEA, three major retailers – Dunnes Stores, Emma Sleep, and JYSK – offer strong contenders for UK and Ireland shoppers.
Dunnes Stores
Dunnes Stores (Irish retailer) sells a king-size waterproof protector with a TPU backing, fitted sheet style, and hypoallergenic properties. It is machine washable at 40°C and fits mattresses up to 30cm deep. At around £15–£20, it’s one of the most affordable options on the market.
Emma Sleep
Emma Sleep UK (direct-to-consumer mattress brand) offers a premium three-layer protector: a recycled polyester top, a waterproof middle layer, and a breathable back. It is OEKO-TEX certified and comes with a 5-year warranty. The company claims it is both silent and highly breathable – a key differentiator from cheaper alternatives.
JYSK
JYSK UK (Scandinavian home goods retailer) stocks quilted waterproof protectors for king size beds (180x200cm) with a TPU membrane. Prices range from £25 to £35, and the protectors include corner straps to secure up to 28cm deep mattresses. JYSK’s quilted design adds a thin layer of padding, appealing to those who want a bit more cushioning.
Confirmed Facts and Questions That Remain
Confirmed facts
- King size mattress dimensions are 76″ x 80″ (standard UK king).
- Waterproof protectors block liquids using TPU or PU layers (The Royce UK).
- IKEA offers at least two king-size protector models.
- Dunnes Stores protector is hypoallergenic and machine washable.
- Emma’s protector uses recycled materials and a 3-layer design.
What’s unclear
- Which brand is objectively best – performance varies by individual sleep needs.
- Long-term breathability of budget options like Dunnes and JYSK – few long-term reviews exist.
- Which protector is quietest – no independent side-by-side noise tests.
- Effectiveness of hypoallergenic claims without full encasement – allergen-blocking certifications are sparse.
- Long-term durability of TPU vs PU membranes – no standardised testing across brands.
The catch: despite well-documented specs, real-world performance varies enough that personal testing may be necessary.
Expert Perspectives on King Size Protectors
Waterproof mattress protectors typically feature a polyester top with water-resistant backing like TPU or polyurethane for liquid repellency.
– The Royce UK (bedding specialist)
Breathable waterproof protectors use cotton or bamboo combined with polyurethane layers to allow air circulation while blocking liquids.
– Victoria Linen UK (specialist bedding retailer)
Saatva Waterproof Mattress Protector uses breathable cotton, is machine-washable, and OEKO-TEX certified, fitting up to 16-inch mattresses.
– Sleepopolis (independent mattress reviewer)
For UK shoppers looking to extend mattress life and guard against spills, the evidence points to a waterproof protector from a trusted brand – with Emma and IKEA leading on breathability, and Dunnes and JYSK offering solid budget picks. The choice between fitted and zippered comes down to whether you need full allergen sealing or just spill protection. For allergy sufferers in the UK, the clear move is a zippered encasement, or a fitted protector if ease of washing matters more.
For those who prioritise spill protection, our guide to the best waterproof king size mattress protector covers the most reliable waterproof options on the market.
Frequently asked questions
How often should I replace my mattress protector?
Most manufacturers recommend replacing every 3-5 years, or sooner if the waterproof layer starts to delaminate or the fabric shows wear. Machine washing gradually reduces effectiveness.
Can a mattress protector help with dust mites?
Yes – a zippered encasement fully blocks dust mites from reaching the mattress surface. Fitted waterproof protectors offer partial protection but don’t seal the sides.
Do mattress protectors affect sleep temperature?
Older vinyl protectors trap heat, but modern breathable waterproof ones use TPU or polyurethane membranes that allow air circulation, minimising temperature impact.
What is the difference between a mattress protector and a mattress pad?
A mattress protector is a thin, fitted cover designed to shield against spills, stains, and allergens. A mattress pad is thicker and adds a layer of cushioning or cooling – often used for comfort rather than protection.
Are hypoallergenic mattress protectors effective?
Yes, when they are fully encased (zippered) and made with tightly woven fabric. Fitted protectors can reduce allergen exposure but don’t provide a complete barrier.
Can I use a mattress protector with an electric blanket?
Yes, but check the protector’s care instructions. Most modern protectors are safe to use with electric blankets as long as the blanket is placed on top of the protector, not directly on the mattress.
How do I measure my mattress for a protector?
Measure the length, width, and depth (thickness) of your mattress. Standard UK king size is 152cm x 198cm (60″ x 78″) but many protectors are designed for 76″ x 80″ imported beds. Always check the product dimensions.
Are all king size protectors the same size?
No – UK king (60″ x 78″) and US/European king (76″ x 80″) differ. Most protectors sold in UK stores for “king” fit 60″ x 78″, but some brands also offer “super king” or “king size” for wider beds. Verify the exact dimensions before buying.
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Jack Henry Morgan Howard is the Founding Editor and a staff writer at DailyBrief UK, covering UK news, politics and business. He works to the newsroom's sourcing and fact-checking standards under Editor-in-Chief Eleanor Whitcombe, so that every briefing is concise, accurate and clearly attributed.