Mountain Warehouse Cloud Kids Snowsuit Review: a genuinely waterproof, no-fuss winter suit for rough play

I’ve been using the Mountain Warehouse Cloud Kids Snowsuit in pink, size 3–4 years, for my kid over a few wet and cold weeks. We’ve had it out in proper British weather: constant drizzle, heavy rain at the playground, and one short but wet snow day. I’m not talking about a quick five-minute test in the garden; I mean full-on muddy park sessions, puddle jumping and sitting on wet swings. This suit has had a decent workout.

The main thing I wanted to check was simple: does it actually keep a kid warm and dry without making them miserable? Kids don’t lie about being uncomfortable; if they’re cold or the fabric annoys them, you know about it fast. Mine is usually fussy with zips and seams and will complain if something rubs or feels stiff. So I was curious to see if this would be one of those suits they refuse to wear after two uses.

What stood out quickly is that the snowsuit is genuinely properly waterproof, not just “sort of water-resistant”. We had one day where it rained non-stop for over an hour at the park. My kid was going down wet slides, kneeling in puddles, and generally doing everything you hope they won’t do in bad weather. When we got home and undressed them, the clothes underneath were dry. Not slightly damp, actually dry. That’s already better than a couple of cheaper supermarket suits we’ve tried before.

It’s not perfect, though. There are a few things that could be better, like the lack of ventilation and the fact that it can get a bit sweaty if the kid runs around non-stop when it’s not that cold. But overall, after a bunch of uses and a few washes, I’d say it’s a pretty solid, no-nonsense winter suit that does what it’s supposed to do without you paying premium-brand prices.

In terms of value, I think this snowsuit sits in a sweet spot between cheap supermarket gear and pricey ski brands. The price I paid was around the £30 mark, which is not nothing for kids’ clothes they’ll outgrow in a season or two, but it’s still far below what you’d spend on premium outdoor brands. Considering how well it performs in proper rain and cold, I’d say it’s good value for what you get.

Compared to the cheaper suits we’ve had before (the kind you find in supermarkets or discount chains), the waterproofing and durability are clearly better. Those cheaper suits often soak through at the seams or around the knees after a while, and the fabric can feel flimsy. With this one, you’re getting taped seams, reinforced knees, and a proper waterproof membrane, which are usually features you only see on more expensive pieces. That alone justifies the price difference for me, because a wet, miserable kid pretty much ruins any outdoor trip.

If you compare it to high-end brands like The North Face or Helly Hansen for kids, those can easily cost at least double or more. Do they have nicer materials and better breathability? Probably. But for typical use – school runs, playground, the odd sledging day – I don’t think a toddler or small child really needs that level of performance. This Mountain Warehouse suit covers the basics very well without you feeling like you’re wasting money on something they’ll only wear one or two winters.

So from a practical parent perspective: if you want something that’s properly waterproof, warm enough for cold days, and tough enough to survive real play, this is good value for money. It’s not dirt cheap, but you can see where the money went. If your kid barely goes outside in winter, it might be overkill. But if they love being out in all weather, it’s a sensible middle-ground option.

The design is very much focused on being practical and kid-proof. First, the one-piece style means no gap between jacket and trousers, which is where snow and cold air usually sneak in. We’ve had that problem with separate salopettes and jackets before; as soon as they bend over in the snow, there’s a draft or wet patch at the lower back. With this suit, once it’s zipped up, that area is completely covered and stays that way. It’s one of the main reasons I prefer a one-piece for younger kids.

The elasticated cuffs and ankles do a good job of sealing out rain and snow. I’ve tucked the legs over both normal wellies and snow boots, and the built-in inner gaiter plus the rubber trim grips the boot fairly well. On a deep puddle day, water didn’t run up the leg, which I’ve had happen with looser designs. The half-leg zips also mean you can get the suit over bulkier boots without too much swearing, which is helpful when you’re trying to get out the door quickly.

The hood design is decent. It’s fleece-lined and stays on reasonably well, but it’s not the tightest around the face. In strong wind you’ll probably still want a hat underneath. It doesn’t have a wired peak or anything fancy, so when it’s really pouring, rain can still get onto the face a bit. But it doesn’t constantly fall back, which is already an improvement over some loose, floppy hoods I’ve seen on cheaper suits.

If I had to nitpick the design, I’d say it’s missing ventilation options. There are no underarm zips or mesh panels, so once it’s on, it’s basically a sealed shell. That’s fine in proper winter or on a ski trip, but on milder days when your kid is running non-stop, they can get a bit too warm and sweaty. Also, visually, it’s pretty plain. It does the job, but there’s nothing special about the look. For me, that’s not a deal-breaker, but if you want style points, this suit is more functional than fun.

In terms of comfort, my kid actually likes wearing this suit, which says a lot. They can move fine in it: climbing on playground frames, crouching, sitting on the floor, and running around. The suit doesn’t seem to pull at the shoulders or ride up when they lift their arms, which I’ve seen with stiffer, badly cut suits. The elasticated waist helps keep the shape closer to the body without it feeling tight, so it doesn’t just hang like a baggy sack.

The warmth level is solid for typical cold and wet days. With a long-sleeve top and a light jumper underneath, my kid was comfortable in around 0–5°C with wind and light snow. They never complained about being cold, even after standing around a bit at the park. The fleece on the upper half feels cosy, and the hood adds an extra layer around the neck when it’s zipped up fully. It’s not the thickest snowsuit I’ve seen, but that’s not a bad thing because it doesn’t limit movement much.

Where it’s less perfect is on those days that are mild but wet. If it’s, say, 8–10°C and your kid is sprinting, climbing and generally going full speed, they can end up pretty sweaty inside because there’s no ventilation. Mine came out with a damp base layer a couple of times, not from leaks, just from sweat. There are no pit zips or breathable panels to dump heat, so you have to judge the weather and maybe use lighter layers under the suit to avoid overheating.

From a practical parent point of view, getting the suit on and off is okay but not lightning fast. The zip opens far enough, but for toilet runs you still have to basically undress them from the top, which is just how one-piece suits are. My kid can’t manage it fully alone yet, but can help. Overall, comfort is good for real outdoor use, with the only real downside being the lack of ventilation on milder, high-activity days.

The outer material is 100% polyamide, and it honestly feels tougher than a lot of budget kids’ gear. It’s got that slightly stiff, durable feel you get on grown-up ski jackets, not the flimsy, noisy plastic you sometimes see on cheap rain suits. I’ve had my kid go down rough slides, crawl on tarmac, and kneel on gravel. So far, I don’t see any obvious scuffs or thinning patches, especially around the knees, which is usually the first place to go.

The reinforced knees are a big plus. There’s an extra layer there, and you can feel it’s thicker and more resistant. My kid spends half the time outdoors kneeling to dig in mud or play with sticks, so that reinforcement is not just marketing text, it actually matters. Compared to a supermarket snowsuit we used last year, which got worn patches at the knees after a month, this one is holding up much better after multiple outings and a few washes.

Inside, the fleece lining on the upper body and hood is soft and not scratchy. It’s not super thick, but combined with a normal jumper underneath, my kid stayed warm in low single-digit temperatures (around 0–5°C) with wind. The lower half being a smoother nylon-type lining is nice because it doesn’t grab onto trousers or leggings, so getting the suit on is easier and the kid can move more freely. It also seems to dry faster if any moisture gets in at the boots.

Stitching and taped seams look clean and consistent. I checked the inner seams after a very wet day and didn’t see any water creeping in. The zippers feel solid enough and haven’t snagged yet, even with my kid being impatient and yanking at them. Overall, the materials feel more like mid-range outdoor gear than bargain-bin kidswear. Nothing feels luxurious, but it’s clearly built for being outside, not just the walk from the car to nursery.

Durability was one of my bigger concerns because kids are brutal on clothes. After several weeks of regular use – playgrounds, muddy fields, and a couple of forest walks – the suit still looks in good shape. The fabric hasn’t thinned, the colour hasn’t noticeably faded, and the seams haven’t started fraying. The reinforced knees in particular are earning their keep; they’ve been scraped on concrete and gravel and still look fine.

I’ve put the snowsuit through the washing machine on a gentle cycle multiple times now, then air-dried it as recommended. So far, the waterproofing still works well. Water still beads on the surface instead of soaking in. Some cheaper suits we’ve had in the past started losing their water repellency after a handful of washes, but this one hasn’t shown that problem yet. I haven’t had to reproof it so far. Obviously, long term you might want to refresh the waterproof coating, but that’s normal for this type of gear.

The zips and elastic parts also seem to be holding up. No teeth missing, no stuck sliders, and the elastic in the cuffs, ankles and waist hasn’t gone loose. Kids pull on these bits a lot, so I was expecting at least some stretching, but it’s still snug. The hood stitching is solid, and there are no loose threads hanging off anywhere obvious. It feels like it could easily last through one child and then be passed on to another, which is important at this age when they grow out of things fast.

Realistically, this isn’t indestructible, but for the price range, the durability is pretty impressive. I’ve seen more expensive branded kids’ outerwear look worse after the same amount of use. If you’re planning to hand it down to a sibling or cousin, I’d say that’s very realistic as long as you follow the wash instructions and don’t tumble-dry it to death.

On paper, the Mountain Warehouse Cloud Kids Snowsuit ticks most of the boxes parents look for: one-piece, waterproof, fleece-lined on top, reinforced knees, taped seams, and boot-friendly legs. It’s marketed for 3–4 year olds, and the model I tested is the pink version. The cut is regular fit, with an elasticated waist, cuffs and ankles, and a hood. Nothing fancy in terms of style: solid colour, no busy patterns, no cartoon characters. If you like simple, it’s fine. If you want something stylish, it’s a bit basic but that’s not really the point of this thing.

The snowsuit has two zipped pockets on the sides, which are actually useful. I’ve used them for gloves, a small snack wrapper, and the usual “treasures” kids pick up outside. The zips are easy enough to open and close with adult hands, and my kid eventually managed them with gloves off. The suit opens with a front zipper that goes down low enough to get the child in and out without wrestling too much, though I still need to help every time. It’s not a quick pee-break outfit; it’s a full suit you commit to for the outing.

Inside, the upper body and hood are lined with soft fleece, while the legs are more of a smooth nylon-type fabric. That setup makes sense in practice: warm where they need it most, but less bulk around the legs so they can move and climb without feeling like a marshmallow. You don’t get fancy features like internal name labels or reflective strips everywhere, but for the price range, the feature list is decent and focused on the basics that matter outdoors.

Overall, the presentation is straightforward: it’s clearly a functional piece of kit, not a fashion item. If you want something that looks premium and Instagram-friendly, this is more “practical parent at the park” than “mini ski resort influencer”. But if your priority is to throw it on your kid and stop worrying about them rolling in wet grass, it lines up well with that goal.

On the core job – keeping a kid warm and dry in bad weather – this suit does the job well. I’ve had it out in steady rain, heavy drizzle, and wet snow. Multiple times, my kid sat on wet slides, knelt in soaked grass, and splashed in deep puddles. Each time, I checked the layers underneath when we got home: socks, trousers and top were dry. The taped seams and waterproof membrane are clearly doing what they’re supposed to do, which is more than I can say for some “water-resistant” suits we’ve tried before.

The reinforced knees are not just a durability thing; they also help with comfort when kneeling on cold, wet ground. My kid spends ages digging in mud or playing with stones, and they never complained about feeling damp or cold through the knees. The inner snow gaiters around the ankles also work. We used them over snow boots once and over wellies several times. No snow or water crept inside from the bottom, which is usually the weak point when kids stomp around in puddles.

Breathability is okay but not fantastic. The suit is described as breathable, and my kid didn’t complain about feeling clammy in cold weather. But like I said earlier, on slightly warmer, very active days, you do notice sweat build-up. It’s not a plastic bag situation, but you won’t get the same level of breathability as higher-end technical ski gear. For the usual park and school run use, it’s fine; for intense skiing or long hikes in mixed weather, you’d need to manage layers carefully.

Overall, in practice, the effectiveness is solid: my kid can stay outside much longer without getting chilled or soaked, which was the whole point of buying this. Compared to a cheaper supermarket snowsuit and a basic rain set we had before, this one clearly holds up better in proper rain and rough play. It’s not high-end technical gear, but for everyday winter and snow fun, it gets the job done very reliably.