People who go looking for a natural mattress usually want two things from it: wool and cotton next to their skin, and a bed that doesn't leave them too warm by the small hours. The Slumberland Naturals Ultimate Wool Mattress is Bensons' fullest answer to both. Slumberland is a heritage name that now sits within Bensons, and this bed is made in Bensons' Huntingdon factory and sold only by Bensons. It's the top of the three Naturals beds, the only one with latex under its quilted top of wool, organic cotton, flax and Tencel, and I lay on all three in a Bensons store at the end of October 2026.
On the Firm, I turned from my side to my back and then onto my front. The latex is what sets it apart from the Premium Wool a rung below, and I could feel it: a springy push-back that made turning over easy, and a top that stayed fresh and cool the whole time I was on it. My back and front were both comfortable. On my side, at 61 kg, it was too hard to settle on.
Back sleepers who sleep warm, at average weight or more, are the people I'd send to this bed, and if that's you it's the Naturals mattress to buy. A front sleeper who likes a firm bed gets on with it too. It's the best-built bed in the range and, to my mind, fairly priced for wool and latex together. Light side sleepers like me should go softer, to the Slumberland Air 6.0 or the Eve Hybrid Duo, both at Bensons.
The latex is the step up from the Premium Wool
Count the springs that carry your weight and all three Naturals beds are the same, with 1,050 full-height pocket springs each. What climbs is the mini springs: 800 on the Plant-Based Luxe, 1,500 on the Premium Wool and 2,000 here, which is how this one reaches 3,050. To my mind minis mostly pad out a total, and I wouldn't pay a penny extra for those 500. I would pay for the latex.
The Premium Wool already has the wool, and both beds stand 32.5cm deep, so the move up to the Ultimate buys you the latex layer and not much else. The Premium Wool is the cheaper bed, and when I lay on it the same day it was softer than I expected for a firm. This one has the bounce and the cooler top, and if you sleep warm on your back that's worth the step.
Both of those have wool in them. If you won't sleep on animal fibres, the Plant-Based Luxe is the Naturals bed for you: no wool, no latex, a hand-tufted top and a choice of three grades. The Ultimate is natural-led more than all natural, too, because its quilting also uses Truecomfort, a filling made from 75 per cent recycled PET plastic. The organic cotton and flax are GOTS approved, which is the kind of certificate I like to see named on a bed sold as natural.
Wool and latex keep the top cool
I hate being too hot, and overheating is what wakes me, so the surface of a bed is the first thing I judge. This one stayed fresh. Wool draws damp away from your skin, flax does much the same, and latex is open and springy enough that it never sleeps hot, whatever you've heard. There's no memory foam anywhere in it to soak up your heat and hand it back at two in the morning.
Owners who mention temperature mostly say it sleeps cool. One says the natural fibres put an end to the hot flushes their old foam toppers had been causing. A few find it warm in a hot summer, and that's the wool quilting, not the latex. Keep the bedroom cool, swap to a thinner duvet in summer, and there's little left for a warm back sleeper to fix.
Medium or Firm: I tried the Firm
Bensons sells it in two grades, and the labels are Bensons' own, so a Medium you liked at another shop tells you nothing here. Pick by weight first, then position. The Firm I lay on suits back sleepers of average weight or more, and front sleepers who like a firm bed. Some owners on the Medium say it came firmer than they expected. One wrote: "Ordered a medium, and felt like a firm, but great." Several found their delivered mattress harder than the display model they lay on before ordering.
So treat the Medium as a gentler firm. Before you order, lie on the exact grade you plan to buy, in the position you sleep in, for a good ten minutes, and expect the one delivered to you to start out firmer than the display bed.
What owners say in their Naturals Ultimate Wool reviews
Most of the owners are delighted with it. Comfort comes up first and most often, and plenty of them say a long-standing sore back eased after they moved onto it. The natural fillings are the reason a lot of them chose it in the first place. One owner can get up in the night without waking their wife, and some who sit on the edge say it feels solid there.
The unhappy owners' biggest complaint is the one I take more seriously than any other on a mattress: early dips. Owners report body-shaped hollows within weeks or months, several of them after rotating it exactly as told. "Sank after only three weeks," wrote one. That's a pattern, not a one-off. It doesn't change who I'd send to this bed, because the build is good and the owners who never see a dip love it. It does change how I'd buy it.
The edge splits opinion too. Some owners lie right out to the side without feeling the edge will give way, while others say the edge gives when they sit on it, and one says the foot squashes flat. And a few say the smell of sheep never went away, where others say it never smelt of anything. A faint sheep smell in the first week is a wool bed being a wool bed; one that's still there in month three isn't, and I'd raise it with Bensons.
How to claim if yours dips
Bensons makes this bed, so its guarantee is Bensons' own and a dip claim goes straight to Bensons, which promises a repair or a replacement. Ask Bensons, in writing and before you pay, what depth of hollow it treats as a fault. One owner was told their dip sat right on the limit and not over it, and that's a conversation you want to have with that number already in your inbox.
From the first week, rotate it as the care guide says and put the dates in your phone, because another owner says the first reply to their dip was that they hadn't followed the aftercare guide. Check your base while you're at it: if the slats sit more than about 7cm (under 3 inches) apart, I look at them before I ever blame a mattress for a dip.
If a hollow appears, strip the bed and lay a broom handle or a long spirit level across it. Measure from the underside to the deepest point of the dip, photograph the tape in place, then send the photos, your order number and your rotation dates to Bensons. If the problem is the feel and there's no dip, the 40 Night Comfort Guarantee exchanges it for a different bed for a charge, provided you've used a mattress protector from the start.
Sheets, stairs and rotation
This bed stands 32.5cm (nearly 13 inches) tall. Ordinary fitted sheets struggle past 30cm, so order deep-pocket ones with the bed. One owner who loves the Medium still says the thickness makes sheets hard to get on. That depth is wool, latex and springs, which is the kind of depth I like, because extra height on a mattress is so often cheap foam.
It's one-sided, so you rotate it and never turn it over, and I'd always rather own a bed I could turn. Owners split on the weight: some say rotating it takes two people and a clear floor, others manage on their own. Measure your stairs and the turn at the top before delivery day, and keep a second pair of hands around for the first rotation.
What to buy instead
If you sleep warm on your back, stay with this one: it's the Naturals bed I'd buy you. If the bounce and the cool top aren't what you need, the Slumberland Naturals Premium Wool gives you the same wool, organic cotton and flax over the same full-height springs, and it was softer under me.
Side sleepers at Bensons should look at memory foam over springs instead. The Slumberland Air 6.0 Memory gave my shoulder the most cushioning of the Slumberland Airs I tried, and the Eve Hybrid Duo let my shoulder and hip sink in while it held my waist up. Of the two, the Eve Hybrid Duo is the better bed to my mind. Both got warm after a while, which is the trade a side sleeper who runs hot makes: softer, and warmer.
