The Polysleep The Sierra is the brand’s value play: a 9-inch, two-layer memory foam mattress made in Canada, listed at $695 for a twin and $795 for a queen. The brand positions it as its most affordable Canadian-made foam mattress, built by reducing non-crucial manufacturing steps rather than by cutting foam quality. This page reads the documented facts from the official Polysleep product page and sets them against what a foam shopper actually needs to know before buying.
If you want the wider picture before deciding, start with our best value mattresses.
The short version: the Sierra is a semi-firm, antimicrobial foam mattress with a 100-night trial and a 5-year warranty, and it is Polysleep’s most affordable Canadian-made foam mattress. Whether that tradeoff in trial length and warranty coverage is acceptable depends on how long you expect to keep the mattress and how sure you already are about a semi-firm foam feel.
Our pick
Saatva Classicthe alternative when you want a longer trial and a lifetime warranty instead of a budget foam build
- 365-night home trial
- Free white-glove delivery and old-mattress removal
- Lifetime warranty
- Three comfort levels and two mattress heights
Who is the Polysleep The Sierra for?
The Sierra is for the shopper who wants a Canadian-made foam mattress at the lowest price Polysleep offers, and who is comfortable with a semi-firm feel and a shorter trial window. It suits guest rooms, first apartments, rental properties, and budget-conscious main bedrooms where a 9-inch profile is acceptable. It is less suited to sleepers who want a long trial, a long warranty, or a soft, plush surface.
According to the official specifications, the Sierra is rated semi-firm on the brand’s 1-to-10 firmness scale, and Polysleep notes that experts from various medical backgrounds recommend a semi-firm mattress between 5 and 8 on that scale. The brand does not publish a single numeric firmness value for the Sierra, so the exact position within that band is not documented. If you already know you sleep best on a soft or on a very firm surface, the semi-firm positioning is the first thing to weigh.
Buyers who should look closely at this model:
- Shoppers with a firm budget ceiling who still want a mattress made in Canada
- Guest-room and rental buyers who need a functional foam mattress without premium pricing
- People who already know they like a semi-firm foam feel and do not need a long trial to decide
- Anyone who values an antimicrobial top layer as a documented feature of the sleep surface
What are the Sierra’s specs and prices by size?
The Sierra is a 9-inch, two-layer memory foam mattress. The comfort layer is 2 inches of Polysleep open cell viscoelastic hybrid foam, ISO 20743 certified, at a density of 3.0 lb/ft3. The support layer is 7 inches of Polysleep foam at a density of 1.5 lb/ft3. The brand states that its foams are latex free. Prices run from $695 for a twin to $895 for a king, and shipping is free to your door.
| Size | Dimensions | Price | Weight |
|---|---|---|---|
| Twin | 39″ x 75″ x 9″ | $695.00 | 41.4 lbs |
| Full | 54″ x 75″ x 9″ | $745.00 | 56.6 lbs |
| Queen | 60″ x 80″ x 9″ | $795.00 | 61.6 lbs |
| King | 76″ x 80″ x 9″ | $895.00 | 78.8 lbs |
The brand also sells bundle options on the product page: an Essential Bundle with two Sierra pillows listed at $98.00 against a $139.98 value, and a Complete Bundle with two pillows and a mattress protector listed at $259.00 against a $369.98 value. Bundle pricing and availability can change, so check the current price on the official site.
How does the Sierra feel and support sleepers?
The documented feel is semi-firm, built from a 2-inch comfort layer over a 7-inch support base. The comfort layer is an open cell viscoelastic hybrid foam, and the support layer is a lower-density Polysleep foam. The brand describes the base layer as made of millions of foam cells that provide support and improve overall comfort. That is the full extent of what the official page states about construction, so any claim beyond these two layers would not be documented.
Two construction facts matter for support decisions. First, the total height is 9 inches, which is on the thinner side for a foam mattress and affects how the mattress sits on a frame or foundation. Second, the support layer density is listed at 1.5 lb/ft3, a figure you can compare against other foam mattresses you are considering. Density alone does not tell you how a mattress will feel, but it is a documented number rather than a marketing phrase.
Side sleepers, back sleepers, and stomach sleepers all react differently to a semi-firm surface, and the official page does not break the Sierra down by sleep position. If you sleep on your side and need deep pressure relief at the hips and shoulders, check whether a semi-firm foam surface matches what has worked for you before. If you sleep on your stomach or prefer a firm, supportive feel, the semi-firm rating is more likely to be in your range.
Does the Sierra sleep cool?
Polysleep states that its open-cell memory foam allows air to flow and temperature to regulate, and it markets this as temperature control for cooler sleep. The antimicrobial top layer, certified to ISO 20743, is presented as a health feature that inhibits the growth of bacteria. Those are the documented claims on the official page. The page does not publish a measured temperature figure, a cooling gel layer, or a phase-change material for the Sierra.
When you check the official product page, look for any cooling detail specific to the Sierra that may have been added since this review was written, and compare it against the foam mattress you are considering as an alternative. A claim of open-cell airflow is a construction description, not a measured result.
How does the Sierra handle motion and edges?
Polysleep describes its viscoelastic open cell foams as designed to minimize vibrations within the mattress, and it markets this as best-in-class motion transfer, meaning you would notice a partner’s or pet’s movements less. The official page does not publish an edge support rating, a roll-off test, or a seated edge measurement for the Sierra. Motion isolation and edge support are two areas where a foam mattress’s behavior depends heavily on your body weight and how you use the bed, so the documented claim is the limit of what can be stated here.
For edge support, it matters if you sit on the edge of the bed to put on shoes, if you sleep close to the edge, or if two people share a queen and want to use the full surface. Check the official page for any updated detail, and consider how much these factors have mattered on your current mattress.
See the Saatva Classic price in your size →
What do the trial and warranty actually cover?
The Sierra ships with a 100-night risk-free trial and a 5-year limited warranty. The trial has a specific condition: you can request a return after 45 nights of sleep, and returns are initiated through the Polysleep website. The warranty covers manufacturing defects, foam durability, and issues with the fabric or zipper, as long as the mattress is kept clean and properly supported. Normal wear, stains, and damage from misuse are excluded.
Read those two policies together before you buy. The 45-night minimum means the first six weeks are a commitment, not a test drive you can end at any point. The 5-year warranty is shorter than what many premium mattress brands publish, and the cleanliness and support conditions are standard but real: a stained mattress voids coverage. For a mattress at this price, a 5-year warranty is a proportionate term, but it is worth knowing that it is 5 years and not longer.
Shipping is free to your door, and the brand notes that for Yukon, Northwest Territories, and Nunavut, additional fees apply and the team will reach out before shipping to confirm costs and timelines. If you are in one of those territories, factor that contact step into your delivery timeline.
Who should NOT buy the Polysleep The Sierra?
Skip the Sierra if you need a long trial to make up your mind, if you want a warranty that runs well past five years, if you need a soft or plush surface rather than a semi-firm one, or if you want a mattress taller than 9 inches. It is also the wrong pick if you are shopping for an adjustable base pairing, a split size, or a hybrid coil build, since none of those are documented for this model. And if you sleep hot and want a documented cooling technology beyond open-cell airflow, the official page does not provide one for the Sierra.
The Sierra is a good fit when the budget is the deciding factor, when the semi-firm feel matches what you already sleep on, and when a 100-night trial with a 45-night return threshold is enough for you to know. It is a Canadian-made foam mattress at a price that starts at $695 for a twin, and the documented construction is a 2-inch comfort layer over a 7-inch support base with an antimicrobial top layer certified to ISO 20743. Those are the facts the official page publishes, and they are enough to make an informed decision if you are honest about which of the exclusions above apply to you.
How does the Sierra compare with the Saatva Classic?
The Saatva Classic is an innerspring mattress with a dual-coil design, a 3-inch Euro pillow top, and three comfort levels: Plush Soft at 3/10, Luxury Firm at 5-7/10, and Firm at 8/10. It comes in two heights, 11.5 inches and 14.5 inches, and the brand lists CertiPUR-US certified foams, GREENGUARD Gold certification, and an endorsement from the American Chiropractic Association. The Sierra is a 9-inch, two-layer foam mattress with a single semi-firm feel. These are two different categories of mattress, and the choice between them is a choice between a budget foam build and a premium innerspring build.
| Feature | Polysleep The Sierra | Saatva Classic |
|---|---|---|
| Type | Two-layer memory foam | Innerspring with dual coils |
| Height | 9 inches | 11.5 or 14.5 inches |
| Firmness | Semi-firm | Three levels: 3/10, 5-7/10, 8/10 |
| Trial | 100 nights, return after 45 nights | 365-night home trial |
| Warranty | 5-year limited | Lifetime warranty |
| Delivery | Free shipping to your door | Free white-glove delivery and setup |
Who should buy the Polysleep The Sierra: shoppers in Canada who want the lowest price on a Canadian-made foam mattress, who are already comfortable with a semi-firm feel, and who do not need a long trial or a long warranty. The Sierra lists at $695 for a twin and $795 for a queen, ships free to your door, and carries a 100-night trial with a 45-night return threshold and a 5-year limited warranty. It is a value purchase, and at that price the shorter trial and warranty are the terms you accept for the savings.
Who should buy the Saatva Classic: shoppers who want a 365-night home trial, a lifetime warranty, free white-glove delivery with old-mattress removal, and a choice of three comfort levels and two heights. The Classic is an innerspring mattress with a dual-coil design and a 3-inch Euro pillow top, aimed at buyers who want a premium build and are willing to pay for it. Check the current price on the official site, as pricing and promotions change.
Verdict
The Polysleep The Sierra is a solid budget pick for Canadian shoppers who want a semi-firm foam mattress at $695 to $895, and who are fine with a 100-night trial and a 5-year warranty. Buyers who want a longer trial, a lifetime warranty, or a choice of firmness levels should look at the Saatva Classic instead.
World Sleep Almanac score: 7.4/10
The World Sleep Almanac editorial score is a judgment made by our team from the documented facts on this page, not a lab test or a hands-on trial. The Sierra earns 7.4 out of 10 across five criteria:
- Price at equal size: 9/10. At $695 for a twin and $795 for a queen, the Sierra is positioned as Polysleep’s most affordable Canadian-made foam mattress, and the price is the strongest argument for it.
- Trial and returns: 6/10. A 100-night trial is workable, but the 45-night minimum before a return can be requested narrows the window.
- Warranty: 6/10. Five years of limited coverage for manufacturing defects, foam durability, and fabric or zipper issues is proportionate to the price but short against premium brands.
- Materials and construction: 7/10. A 2-inch ISO 20743 certified antimicrobial comfort layer over a 7-inch support base, latex free, made in Canada, is a documented and coherent build for a value mattress.
- Public customer reviews: not documented here. The official page does not publish a review count or rating for the Sierra, so this criterion was not scored.
The score is weighted toward the price and construction, which are the Sierra’s clear strengths, and pulled down by the trial length and warranty term. The method behind our editorial scoring will be explained in full on a dedicated methodology page when it is published.
A useful companion to this page: our Polysleep the Aura review.
Frequently asked questions
How thick is the Polysleep The Sierra?
The Sierra is 9 inches thick in every size. The official page lists the height as 9 inches for twin, full, queen, and king, with a 2-inch comfort layer and a 7-inch support layer making up that total.
What is the trial period for the Sierra?
Polysleep offers a 100-night trial on the Sierra. The brand states that you can request a return after 45 nights of sleep, and returns are initiated through the Polysleep website. The official page also lists a 30-night trial in the header area of the product listing, so confirm the current trial terms on the official site before you order.
Is the Sierra made in Canada?
Yes. Polysleep states that the Sierra is entirely made in Canada, and that the brand invested in manufacturing automation to create its most affordable Canadian-made foam mattress by reducing non-crucial steps in the process.
Does the Sierra come with a warranty?
Yes, a 5-year limited warranty. It covers manufacturing defects, foam durability, and issues with the fabric or zipper, provided the mattress is kept clean and properly supported. Normal wear, stains, and damage from misuse are not covered.
What sizes does the Sierra come in?
Twin, full, queen, and king. Prices are $695.00, $745.00, $795.00, and $895.00 respectively, and weights range from 41.4 lbs for a twin to 78.8 lbs for a king.
Reviewed by the World Sleep Almanac editorial team. Updated 2026.