Anyone who sleeps hot has already tried the obvious fixes: a thinner duvet, the window open, one foot hung out of the side. If you've ended up here, they didn't quite do it, and you're still waking up sticky with the covers on the floor. When a synthetic duvet leaves you clammy, wool is the answer, and Woolroom is the shop I'd send you to for it. The Woolroom Classic Wool Duvet in Light is the lightest of the three duvets in Woolroom's Classic range, sold direct by the brand: 200gsm of British wool quilted between two layers of plain cotton, which Woolroom puts at the equivalent of 2 to 5 tog. It's the summer weight, and it's my pick for hot sleepers and night sweats. Once it's on the bed it sits low and close along your body, more like a thick cotton quilt than a duvet, and it stays dry on the nights a polyester one would turn damp.
Sleep warm rather than hot and the Woolroom Classic Medium, with 350gsm of the same wool, is the all-rounder for a heated bedroom; feel the cold and the Woolroom Classic Warm has 500gsm. The Woolroom Deluxe Washable Light sits in the same warmth band for more money, because its wool is treated so it can go in the washing machine. I'd keep the money and buy the Classic: same wool, same warmth, and the wash is the only thing the extra buys. Now the part a light wool duvet can't do. It stops the damp, sticky misery of a hot night, but it is not a cure for night sweats, and a very hot sleeper will still be warm under it in a heatwave.
This is the duvet for someone who runs warm all year, for menopause nights spent throwing the covers off, and for a bedroom that stays warm long after the heating goes off. Owners who'd found heavier wool duvets too much call this one just right, and one who'd bought the Medium the year before and found it too warm says this duvet is ideal. The one in the house who's always cold should pass, and so should anyone who wants a big, plump duvet to burrow under, because this one is slim, flat and heavier than its name.
Wool for night sweats: drier, not colder
Wool works on the damp. Each fibre takes up the moisture your body gives off in the night and lets it go again, so the air under the duvet stays dry. Under polyester that damp has nowhere to go, which is why you wake up sticky, throw the covers back, and then wake again later feeling chilly. Wool stops that cycle. It doesn't lower your temperature, and even the lightest wool duvet is a layer of insulation lying over you.
For plenty of owners the dry part is the whole fix. One who'd suffered night sweats for a year says it has "totally stopped" them, and others talk about getting through the night without waking up wet. Another still wakes up hot, though "not as bad or often as with my previous quilt", and that's what to expect on a bad night. When this duvet disappoints, it's heat. The unhappy owners bought it to cure overheating and were still flinging it off, one of them too hot "even with the lightest wool duvet".
If the sweats come with the menopause, the duvet is one piece of a cooler bed, alongside a cool room and breathable cotton sheets, and it won't touch the cause. Anything beyond comfort is a conversation for your GP, and so are night sweats that turn up with other symptoms.
Very hot sleepers will still be warm in a heatwave
Nothing you put on a bed makes a heatwave comfortable, and 200gsm of wool is still more than a very hot sleeper wants on a close July night when the bedroom won't cool down. One owner found it "too hot even though the temperatures have not been high". On those nights, fold it down to your waist or sleep under the top sheet alone, and keep the curtains shut through the afternoon. My advice to a hot sleeper never changes: natural fibres on the bed, a cool room and a lighter duvet, and this is the lightest wool duvet I'd send you to.
In a warm house it can do the whole year. Owners who keep it on through winter add a light throw on top, and one is ready with a wool blanket "should it turn arctic". Others keep the Light for summer and swap to the Medium when the heating comes on, which is what I'd do in a colder house. The Classic has no poppers, so you can't clip two weights together the way you can with Woolroom's 3-in-1. Layering here means a throw on top.
Slim and flat, with more weight than the name suggests
Light describes the warmth. On the scales a double weighs about 2kg, and one owner said plainly that they didn't consider it lightweight. That weight comes from wool being dense, so the warmth sits in a thin layer: the duvet is slim, flat, and quilted all over in small diamonds. "Not fluffy like microfibre or down. Flatter like a quilt," is how one owner put it, and that's the feel exactly. It follows the line of your body instead of standing up off it, and one owner says there are no cold spots in spite of how thin it looks.
Quilting that close means the wool can't wander, so you won't find it piled up at the foot of the bed, and the cotton is soft and silent when you turn over. If you like a bed that still looks made in the morning, this is a tidy duvet to live with.
Buy a size up if you share it
This is the advice I'd most want a couple to hear. A fluffy duvet falls down the sides of the bed and tucks round you both. A flat wool one stays across the top of the mattress, so there's less spare to go round, and the first tug in the night leaves one of you uncovered. My partner steals the duvet, so I know how that ends. Sharing a double bed, buy the king; in a king bed, buy the super king. The cover goes up a size with it.
Measure the covers you own before you order, too. The double is exactly 200 x 200cm (about 79 inches square), the same as a standard double cover, and flat wool doesn't squash down the way hollowfibre does. Some owners found it wouldn't sit flat, and one says it "curls at the edges where you try to squeeze the duvet in", while another calls the fit spot on. Choose a cover a few centimetres roomier and the duvet goes in without a fight. If the two of you sleep at different temperatures, skip the shared duvet altogether: a single Light on the hot side and a single Medium on the other is how I'd make up that bed.
Keep a cover on it, because it can't go in the machine
The Classic is dry clean only. Its wool is scoured and washed before it's quilted, but it hasn't been through the chlorine solution that lets the Deluxe Washable go through a wool cycle, and that catches people out. One owner only spotted it after ordering, when they noticed Woolroom's other duvets were washable, and thought about sending it back. For a hot sleeper it's less of a problem than it sounds, because wool lets go of the damp it takes up. Give it a few hours on the washing line when the weather's fine, keep a washable cover on it in between, and never vacuum-pack it. When it does need a proper clean, make sure the dry cleaner knows it is dry clean only. One owner's came back washed instead, and it "shrunk badly".
Two more things to know before it arrives. You're buying British wool you can trace back to its farm, in a duvet made in the EU. Some owners only found that out from the label, and it surprised them. It also smells of wool at first. Owners who notice it mostly call it slight and say airing sees it off, though one owner's granddaughters refused to sleep under theirs, so give it a day outdoors before the first night.
What to buy instead
Your better buy is still a Woolroom duvet, just a different one. If dry clean only is the deal-breaker, the Woolroom Deluxe Washable Light gives you the same summer warmth in an organic cotton cover that goes in the washing machine, for more money. If you only run a little warm and your bedroom is heated, the Woolroom Classic Medium is the better buy for the whole year.
If you'd rather own one duvet for every season, the Woolroom Deluxe Washable 3-in-1 All Season is a Light and a Medium that clip together for winter. Go in knowing the poppers can come undone in the night, leaving the two layers bunched inside the cover.
