The 6 Best Simba Mattresses and Bedding for 2026

The Pro is the middle of Simba’s ladder and the one most buyers should stop at. The product page lists it as medium-firm, 28cm deep and eight layers, with a wool comfort layer under a Stratos cool-touch cover, two layers of Aerocoil microsprings (up to 3,800 of them) and SupportCore steel springs underneath, 4,800 springs in all in a king. The cover zips off and is machine washable. A HeatRelease version costs more in some sizes.

It carries more than 38,000 reviews, though a note admits these include earlier versions of the model. Read lowest first and three complaints recur: edges soft enough to compress with one hand, a depth that one owner measured at about 26cm, and dips forming where two people lie, sometimes inside the first year. Others simply found it too firm.

The Pro Core is the cheapest way to get Simba’s deeper mattress. It keeps the Pro’s 28cm depth, eight layers, wool top layer and Stratos cover, but swaps the double microspring tier for one layer of Aerocoils over high-elasticity foam, which brings the count down to 2,900 springs in a king. Simba’s own model chooser tags it with a Which? Best Buy badge.

The price needs reading. In October 2026 the page called it an introductory price ending on 31 October, under an “overstock” banner, so check what it costs on the day. The other caution is evidence: it had barely two dozen reviews, and the critical ones say it feels softer than medium-firm, with squashy edges. Two of them refer to a “Pro Breeze”, which suggests some reviews belong to an older name.

This is the mattress that made Simba’s name, and it is still sold under the plain name Hybrid. The page lists five layers in 25cm, nine support zones and a medium-firm feel, built from a single tier of up to 1,900 Aerocoil springs, a deep graphite-infused foam layer and a stabilising foam core. There are no steel coils at the base, which is the main difference from the Pro.

With well over 100,000 reviews attributed to it, the praise is easy to find, and so is the pattern in the one-star pile. Buyers describe it as too firm or too soft in roughly equal measure, several say it sank and had to be swapped more than once, and one measured the depth at about 22cm against the advertised 25cm. For two adults every night, the Pro Core is the better use of similar money.

The Ultra is where Simba puts everything. The page lists 11 layers in 34cm, the highest spring count in the range (up to 7,300, in three microspring layers above the steel base), two layers of graphite foam, a latex-and-coconut layer it calls PureLift and a FusionCool layer blending wool, charcoal, bamboo and kapok. Unlike the rest of the range, it is described as plush rather than medium-firm.

At this price the complaints matter more, and they are about longevity. Several owners on Simba’s own review feed describe dips appearing within months and being on a second or third replacement; others found it too bouncy, with every movement carried across the bed. A 34cm mattress also needs deeper fitted sheets than most cupboards hold.

Simba’s pillow is a bag of small foam cubes it calls Nanocubes inside an outer sleeve of fibre, under a zip-off cotton cover with Stratos cool-touch treatment and a mesh border. Take cubes out to lower and soften it, put them back to raise it; a spare storage bag for the extras comes in the box. A pair costs £199 rather than two at £109.

The reviews are strongly split. Plenty of owners love it, but the lowest-rated ones say the same things repeatedly: lumpy, too thick even with a lot of filling removed, and a source of neck pain rather than a cure. A couple mention a chemical smell on arrival. Pillows only get 30 days to return, not 200 nights, so start adjusting on the first night.

The Hybrid Duvet is a 10.5 tog, square-stitched synthetic duvet with a breathable cotton cover treated with Stratos, filled with a fibre Simba calls Renew Bio. It is machine washable and comes with a reusable storage bag. If you want to switch weights through the year, the 3-in-1 version (7 and 3.5 tog) costs more.

The weakness is one you might not expect, and it comes up again and again in the lowest reviews: noise. Several owners describe a crinkly, rustling cover that sounds like a waterproof sheet, and a few found it too hot for a year-round duvet. Many of the reviewers got it free with a mattress, so judge it as a buy with that in mind.