Mattress Protector vs. Mattress Encasement: Which One Does Your Bed Actually Need?
Mattress Protector vs. Mattress Encasement: Which One Does Your Bed Actually Need?
A practical guide for Canadian sleepers who want to protect their investment, breathe easier, and sleep better.
Your mattress is one of the most expensive purchases you'll make for your home. And yet, most Canadians give it almost no protection at all. We put a sheet on it, maybe a pad, and call it a day. Meanwhile, dust mites colonize the surface, spills seep into the core, and allergens build up night after night.
If you've been browsing our collection at Bio-Beds Plus, you've probably noticed we carry two distinct types of mattress protection: the myProtector by Sleep & Beyond and our Organic Cotton Waterproof Mattress Encasement. They look similar in photos. They serve very different purposes.
Let's break down the difference — and help you decide which one belongs on your bed.
The Core Difference: Coverage and Purpose
Think of it this way: a mattress protector is a shield for the top of your mattress. A mattress encasement is a full-body armor for the entire thing.
The myProtector by Sleep & Beyond (from $227) is a fitted-style protector with a 100% washable wool filling and a waterproof microfiber skirt. It covers the top surface and wraps around the sides like a fitted sheet. It's breathable, temperature-regulating, and ideal for someone who wants extra comfort on top of their mattress while staying protected from spills and stains.
The Organic Cotton Waterproof Mattress Encasement (from $159) is a six-sided, zippered enclosure. It completely surrounds your mattress — top, bottom, and all four sides — creating a sealed barrier. Made from GOTS-certified organic cotton jersey with a non-toxic TPU waterproof layer, it's designed for maximum protection: dust mites, bed bugs, allergens, spills, and stains cannot get in or out.
One protects the surface. The other protects everything.
Why Encasements Matter More Than Ever in 2026
A decade ago, a mattress protector was considered a nice-to-have. Today, health authorities and allergy organizations are increasingly clear: if you want to control allergens in your bedroom, a zippered encasement is not optional.
Here's what the experts say.
Asthma Canada's Position
Asthma Canada explicitly recommends encasing mattresses, pillows, and box springs in allergen-resistant covers as a core strategy for managing dust mite exposure. Dust mites — microscopic creatures that thrive in warm, humid bedding — are among the most common allergic asthma triggers in Canadian homes. Their droppings accumulate in mattresses over time, and every time you move in bed, you're potentially breathing them in.
The Asthma Society of Canada goes further, recommending specifically that bedding products carry the "asthma & allergy friendly™" certification, which verifies that a product has an effective allergen barrier and was manufactured without chemicals at levels that may trigger symptoms.
A properly installed encasement traps existing dust mites inside and prevents new ones from colonizing. Research cited by Canadian health resources suggests that within two weeks of encasing a mattress, dust mite populations can drop by as much as 90 percent.
Health Canada on Bed Bugs
Health Canada has issued public advisories on bed bugs, noting that these pests "can hide in tight places and are most commonly found in cracks and crevices near sleeping areas, like headboards, box springs, seams of mattresses and upholstered furniture." The agency explicitly recommends using "sealable plastic bags or encasements designed to keep bedbugs out of your luggage and other personal belongings" when traveling.
That advice extends to your home mattress. A zippered encasement prevents bed bugs from entering or exiting the mattress. If bed bugs are already present, the encasement traps them inside, where they eventually die. If they're not present, it prevents them from ever taking up residence in the one item that's hardest to treat.
And bed bugs aren't just a nuisance. The psychological toll of an infestation — anxiety, insomnia, and distress — is well documented, and the pesticides used to treat them carry their own health risks.
Side-by-Side Comparison
| Feature | myProtector by Sleep & Beyond | Organic Cotton Encasement |
|---|---|---|
| Coverage | 5-sided (top + sides, fitted skirt) | 6-sided (full zippered enclosure) |
| Materials | Wool fill, organic cotton percale, waterproof microfiber | 100% GOTS organic cotton jersey, TPU waterproof layer |
| Breathability | Excellent — wool regulates temperature | Good — breathable TPU |
| Best For | Comfort + spill protection | Maximum allergen, bed bug, and stain protection |
| Warranty | 10 years | 10 years |
| Price | From $227 CAD | From $159 CAD |
| Machine Washable | Yes (gentle, air dry) | Yes |
| Silent/Crinkle-Free | Yes | Yes |
Which One Should You Choose?
Choose the myProtector if:
- You want a plush, breathable layer that adds comfort
- You're primarily concerned about spills, stains, and everyday wear
- You sleep hot or cold and want temperature regulation from wool
- You don't have severe allergies or bed bug concerns
Choose the Organic Cotton Encasement if:
- You have dust mite allergies, asthma, or eczema
- You want the most complete protection possible
- You're concerned about bed bugs (or want to prevent them)
- You want a non-toxic, organic-certified barrier
- You're protecting a significant mattress investment long-term
Pro tip: Some customers use both. A zippered encasement goes on first as a permanent barrier. Then a waterproof protector (or a wool topper) goes on top for comfort and easy laundering. It's the belt-and-suspenders approach — and it works.
Frequently Asked Questions
Can I wash a mattress encasement?
Yes. The Organic Cotton Encasement is machine washable. Wash in cold or warm water on a gentle cycle and air dry or tumble on low. Avoid bleach and high heat, which can damage the waterproof membrane.
Will an encasement make my mattress feel different?
No. A quality encasement like ours is made from soft, stretchable jersey fabric with a silent TPU layer — no crinkling, no plastic feel. You shouldn't notice it's there at all.
Does an encasement protect against bed bugs if I already have them?
Yes — it traps existing bed bugs inside the mattress, where they cannot feed and will eventually die. However, an encasement alone won't eliminate bed bugs from the rest of the room. It's one critical piece of a broader treatment plan.
How often should I wash my encasement?
We recommend washing every 3-6 months, or more frequently if someone in the household has allergies or if there's been a spill.
Is TPU safe?
Yes. Our TPU (thermoplastic polyurethane) waterproof layer is free of vinyl, PVC, phthalates, and other harmful chemicals. It's a non-toxic, food-grade material commonly used in medical and baby products.
Will it fit my mattress?
The Organic Cotton Encasement comes in two depths: the 10" option fits mattresses 8–12" tall, and the 14" option accommodates 12–16". The stretchy jersey fabric ensures a snug, secure fit.
What's the warranty?
Both products carry a 10-year warranty through Sleep & Beyond, covering manufacturing defects.
Your mattress works hard for you every night. Protecting it isn't just about preserving your investment — it's about protecting your health. Whether you choose a breathable wool protector or a full zippered encasement (or both), you're taking a meaningful step toward a cleaner, healthier, better night's sleep.
Shop our full collection of organic mattress protection at Bio-Beds Plus.
