The Modway Kate is a 6-inch innerspring mattress built for value first, and the official spec sheet makes that clear from the opening line. Modway lists an integrated Bonnell spring system paired with a 0.4-inch cushioning foam layer, a padded polyester quilt top, and felt liners placed above and below the coils. The King size carries a listed price of $250.13 on the official Modway page, alongside free shipping and 30-day returns. This is an entry-level coil mattress aimed at shoppers who want a standard King footprint in a short profile, and the construction details tell you exactly what you are getting for the money.
We also weigh this mattress against its rivals in our best innerspring mattresses.
Our pick
Saatva Classicthe innerspring alternative when you want more height, trial time and support options than a 6-inch budget coil mattress offers
- 365-night home trial
- Free white-glove delivery and old-mattress removal
- Lifetime warranty
- Available in three comfort levels and two heights, 11.5 inches and 14.5 inches
Who is the Modway Kate for?
The Modway Kate suits shoppers who need a low-profile innerspring mattress at a low price, such as for a guest room, a child’s room, a bunk or loft setup where height matters, or a first apartment. The official page lists the King at 76 inches long, 80 inches wide and 6 inches high, so it is a standard King footprint in a short height. It also suits buyers who prefer a traditional coil feel over foam, since the brand lists an integrated Bonnell spring system with felt liners above and below the coils.
Who should buy it, and who should not: buy the Kate if your priority is a compact, affordable innerspring mattress with a 10-year warranty and a 30-day return window. Look elsewhere if you need a mattress taller than 6 inches, a longer home trial, or the comfort choices that come with multiple firmness options.
What does the Modway Kate actually contain?
According to the official specifications, the Modway Kate layers are straightforward. The brand lists a padded polyester quilt top, a 0.4-inch cushioning foam layer, an integrated Bonnell spring system, and two felt liners, one placed above the springs and one below. The cover is described as a fire-resistant polyester barrier, and the mattress ships vacuum-packed, new from the factory. Modway states the felt liners are there to evenly distribute weight and relieve pressure on hips, back and shoulders.
That layer list tells you what the mattress is made of, not how it performs. The Bonnell system is the classic open-coil design where springs are tied together, and the 0.4-inch foam layer is a thin comfort layer by any standard. There is no memory foam, no latex and no individually wrapped coils listed for this model. If you are used to foam mattresses that contour closely, the Kate is a different category of product.
How tall is it, and does 6 inches matter?
The official dimensions are 76 inches long by 80 inches wide by 6 inches high for the King. Six inches is short for an adult main-bed mattress, and height affects two things: how high you sit when getting in and out, and how much total comfort material sits between you and the coil core. With a 0.4-inch foam layer, most of that 6 inches is the spring system and the quilt top. Height matters most for sleepers with mobility issues, for kids transitioning to a bed, and for anyone pairing the mattress with a thick foundation or platform. It also matters for bunk beds and trundles where clearance is limited. If you are replacing a mattress that was 10 inches or taller, expect a noticeable difference in how the bed feels when you sit on the edge and when you lie down.
Modway Kate specifications at a glance
| Spec | Modway Kate (King) |
|---|---|
| Overall dimensions | 76 inches L x 80 inches W x 6 inches H |
| Spring system | Integrated Bonnell spring system |
| Comfort layer | 0.4-inch cushioning foam |
| Liners | Felt liners above and below springs |
| Top | Padded polyester quilt top |
| Barrier | Fire resistant polyester barrier |
| Shipping state | Vacuum-packed, new from the factory |
| Listed price (King) | $250.13 on the official page |
| Shipping | Free shipping |
| Returns | 30-day returns |
| Warranty | 10-year warranty |
How much does the Modway Kate cost?
The official Modway page lists the Kate Mattress King at $250.13, and the same page shows another Kate listing at $267.09 in the related products area. The page also lists free shipping and 30-day returns as the delivery and return terms for this product.
At this price the Kate competes with other budget innerspring and foam mattresses rather than with premium coil beds. The Modway site also lists other mattresses in its range, including the Mila, the Jenna innerspring and foam mattress, and the Aveline memory foam mattress, so it is worth comparing those listings if you want a different construction at a similar budget. The Kate is the option in this group with the Bonnell coil core and the 6-inch profile.
See the Saatva Classic price in your size →
What do the trial and warranty terms mean for you?
The brand lists a 10-year warranty on the Kate Mattress, plus 30-day returns and free shipping. A 30-day return window is short compared with the home trials offered by many mattress-in-a-box brands, so it is the term to read closely before ordering. The 10-year warranty covers defects in materials and workmanship for a decade, which is a standard term at this price point. The official page does not spell out the warranty’s proration, what counts as a defect, or whether a foundation requirement applies, so read the full warranty text on the Modway site before you buy. Keep your order confirmation, since warranty claims usually require proof of purchase.
Who should NOT buy the Modway Kate?
Skip the Kate if you want a mattress over 6 inches tall, if you sleep primarily on your side and need deep pressure relief, or if you want a trial longer than 30 days. It is also the wrong pick if you need a Twin, Full, Queen or Cal King and only see the King listed at this price, since other sizes may be priced differently or listed separately. And skip it if you want a choice of firmness, because the official page lists one build with no comfort options.
Also consider your body type and sleep position honestly. A 6-inch Bonnell innerspring with a 0.4-inch foam layer is a thin comfort stack, and sleepers who need more cushioning at the hips and shoulders generally look at taller mattresses. If you are buying for a guest room that gets occasional use, or for a child who is still growing, the profile may be exactly what you need instead.
How does the Kate compare with the Saatva Classic?
The Saatva Classic is an innerspring mattress with a very different spec sheet. Saatva lists a 3-inch Euro pillow top, a dual-coil design with over 1,000 recycled carbon steel coils in full size and up, triple-tempered for durability, and patented Lumbar Zone technology for spinal alignment. It comes in two heights, 11.5 inches and 14.5 inches, and three comfort levels: Plush Soft at 3 out of 10, Luxury Firm at 5 to 7 out of 10, and Firm at 8 out of 10.
The trial and service terms also differ. Saatva lists a 365-night home trial, free white-glove delivery with in-room setup, free old mattress removal when you check the box at checkout, and a lifetime warranty for the original purchaser. Certifications listed for the Saatva Classic include CertiPUR-US certified foams and GREENGUARD Gold certification, plus endorsement by the American Chiropractic Association. The Kate lists a 10-year warranty, 30-day returns and free shipping, with no certifications stated on its official page.
| Point of comparison | Modway Kate | Saatva Classic |
|---|---|---|
| Height | 6 inches | 11.5 or 14.5 inches |
| Comfort options | One build listed | Plush Soft, Luxury Firm, Firm |
| Top layer | 0.4-inch cushioning foam under a quilt top | 3-inch Euro pillow top |
| Coil design | Bonnell spring system | Dual-coil, over 1,000 recycled carbon steel coils in full and up |
| Home trial | 30-day returns | 365-night home trial |
| Delivery | Free shipping | Free white-glove delivery and setup, plus old mattress removal |
| Warranty | 10 years | Lifetime, original purchaser |
Who should buy which: the Modway Kate is for shoppers whose budget and height needs come first, including guest rooms, kids transitioning to a bed, bunk and loft setups, and first apartments where a short profile is a requirement rather than a compromise. The Saatva Classic is for sleepers who want a full-height innerspring mattress with a choice of comfort levels, a long home trial, and white-glove service that includes setup and old mattress removal. The two products sit at very different price tiers, and the choice follows from how you plan to use the bed.
World Sleep Almanac score: 6.4/10
The World Sleep Almanac editorial score is based on five criteria: price at the same size, trial and return terms, warranty length, materials and construction, and public customer feedback. The Modway Kate earns 6.4 out of 10. The listed King price of $250.13 with free shipping is strong for the budget tier, and the 10-year warranty is a standard term at this price. The score is held down by the 30-day return window, the single build with no firmness choice, and the 0.4-inch comfort layer, which is thin for adult side sleepers. The rating is an editorial judgment drawn from the published specifications, not a hands-on test result.
Verdict: the Modway Kate is a sensible buy when you need a compact, affordable innerspring King with a 10-year warranty and you accept a 30-day return window. It is the wrong buy if you want a taller mattress, a longer trial, or a choice of firmness. For a full-height innerspring with more comfort options and a 365-night home trial, the Saatva Classic is the alternative to weigh.
Our pick
Saatva Classicthe taller innerspring choice when a 6-inch budget coil mattress is not enough
- 365-night home trial
- Free white-glove delivery and old-mattress removal
- Lifetime warranty
- Three comfort levels and two heights, 11.5 inches and 14.5 inches
Frequently asked questions
Is the Modway Kate a good choice for a bunk bed?
The Kate’s 6-inch height makes it a natural candidate where clearance is limited, such as bunk beds, loft setups and trundles. The official dimensions of 76 inches long by 80 inches wide by 6 inches high describe the King, and the short profile keeps the sleep surface close to the frame. Confirm the specific clearance of your bunk or loft frame before ordering, since the Kate is listed in one height only.
Does the Modway Kate come in sizes other than King?
The official page shows the Kate Mattress King at $250.13, and the related products area shows another Kate listing at $267.09. Other sizes may be listed separately or priced differently, so confirm the size and price you need on the official Modway page before ordering.
What is a Bonnell spring system?
Bonnell springs are the classic open-coil design in which the springs are tied together across the mattress core. Modway lists an integrated Bonnell spring system for the Kate, paired with a 0.4-inch cushioning foam layer and felt liners above and below the coils. This is a traditional innerspring build rather than a foam or individually wrapped coil construction.
How does the Kate’s 30-day return window compare with other options?
Modway lists 30-day returns for the Kate, which is a shorter window than the 365-night home trial Saatva lists for the Saatva Classic. If a long trial matters to you, weigh that difference before ordering, and read the current return policy on the official site.
Is the Modway Kate certified by any foam or emissions program?
The official Modway page for the Kate lists no certifications. By comparison, the Saatva Classic page lists CertiPUR-US certified foams, GREENGUARD Gold certification, and endorsement by the American Chiropractic Association. If certifications matter to your purchase, that is a clear point of difference between the two products.
Reviewed by the World Sleep Almanac editorial team. Updated 2026.