Decathlon

MT900 Air Insulator (XL)

Decathlon MT900 Air Insulator (XL)

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Overall

#33 in

Sleeping Pads

according to Reddit Icon Reddit

Sentiment score79% positive
11
2
1
Last updated: May 14, 2026

Reddit Reviews

Reddit IconAltruistic_Try4786
4 months ago

Years ago I'd only use a CCF and big sleeping bag because in my early 20s I didn't care. Now I'm approaching 40 I slept out this weekend in -2 on a thin CCF and cheap inflatable. I was a bit cold but also uncomfortable. Spent more time than I'd care to admit wrestling with this debate to order something before I go out again at the end of the month. In the end I went for a mt900 xl because it packs small and light is very warm and supposedly very comfortable. I was a nats hair away from getting the mt500 and a better CCF but decided on overall weight and bulk vs cost

Reddit IconBourbonFoxx
8 months ago

Haha no idea I'm loving the Forclaz MT900 from Decathlon at the moment so for the time being I'll just enjoy cinching that nice and tight and carrying half a kilo less mat around I know Osprey are well rated but around here they're very 'struggling to park your massive SUV in the National Trust car park' so I'm avoiding them!

Reddit IconFirstCav
8 months ago

I have the MT900 Air XL (195x63, R5,4, 675g). I'm quite happy with it.

Reddit IconGamasFTW
4 months ago

I’ve had this pad for a couple of years (from when it was forclaz branded). I’d recommend it, it feels warmer than my higher rated sea to summit, packs up reasonably small and isn’t too heavy. I’ve never had any issues with it going down or getting any punctures. Only downside is that none of the default flextail nozzles fit it, so you have to awkwardly hold the closest fitting nozzle against the pad when inflating (or just use the pump sack). They may have changed the nozzles though in this iteration

Reddit Icongeorgecwbrown
4 months ago

I have this. Have inflated & used it about 10 times with no punctures. Comfortable. I’m 6ft 2 & about 100kg. It was my first sleeping mat mind you. I’ve used one other that was nowhere near comfortable.

Reddit IconJeemz
10 months ago

Just getting into hiking and I am planning some 3-season trips in the Pyrenees. I'm trying to put together a lightweight sleeping system (pad + quilt or sleeping bag), but nothing too high-end or ultra-specialized. I’m looking for gear that’s solid, not too heavy, and works well for a side sleeper. The core idea is to have something lightweight to try trekking and not invest too much for the moment. I recently made a post about a tent and after interesting feedback I went for the Naturehike Mongar UL. This may give you a hint as to what I am looking for. Budget-wise, I'm thinking max \~140€ for the sleeping pad and \~200€ for the quilt or bag. I am EU based. For the pad, here’s what I’ve been looking at: * Decathlon MT900 Insulated XL : 740g, 130€, R-value 4.2, 40D bottom. Seems like the best option so far. * Naturehike 5.8 : probably too thin for side sleeping, at least that's what I've gathered from feedbacks * Naturehike 8.8 : thicker, but the 20D fabric on the bottom makes me a bit nervous for long-term use. Not a lot of feedback out there either. * Lighttour 7.5 : maybe too warm for 3-season use, and not much real-world info on it. If anyone has other recommendations for a lightweight, side-sleeper-friendly pad around that price range, I’d love to hear them. I'm thinking because inflatable sleeping mattress are kinda fragile, a reputable brand would be best to have some warranty. For the quilt/sleeping bag, I’m aiming for a comfort temp around 0°C. I think I'd prefer a quilt, but I want to avoid down that comes from live-plucked birds. That’s kind of a sticking point for me. Some models I’ve looked into: * Aegismax Wind Hard Twilight II / Tiny 2 / Tiny Pro * Ice Flame Outdoor Extra Quilt 32°F Problem is, I can’t find solid info about how their down is sourced, so I’m hesitant. If I don’t find a quilt I’m comfortable with ethically, I might just go with the Decathlon MT900 sleeping bag (size L) : 950g, decent specs, RDS certified. Any input or recommendations would be super appreciated !

10 months ago

Hey, thanks for the recommendation I’ve seen the Waratah mentioned quite a bit and I understand it’s a solid piece of gear. But honestly, it’s not a 200€ quilt if you're ordering from the EU The base price is 180€, then 24€ shipping, and that’s before VAT (20%), customs duties, and handling fees. All in, you're looking at more like 260–270€ delivered That’s why I’m a bit surprised it keeps getting suggested as a budget option for EU folks

10 months ago

Cheers!! Just looked at [the NXT variant](https://iceflamegear.com/product/semi-standard-mono-nxt/) and it seems RDS certified! Also no import taxes! It looks perfect I'll dig a bit more

10 months ago

Thanks for the rec. Yeah Aegismax sounds solid, I'm just looking for RDS certification for this time so I'll pass. Also thanks for the offer, for a sleeping bag especially I'll be looking at some warranty because it looks like popping a mat can happen easily. Unless you bought from an international dealer that also happens to be in France?

7 months ago

For now we went with the Decathlon MT900 because we can return them very easily no questions asked. We used them a few times but way above their comfort temp, prob around 10C, so I can't comment on their claimed 0C comfort

Reddit IconParticular_Syrup4109
10 months ago

For the sleeping pad: The Simond MT900 Insulated XL from Decathlon has a R-value of 5.4. It’s nice for side sleeping, real good comfort for price. For a quilt: I would recommend the Neve Gear Waratah Quilt. -2C comfort rating for cold sleepers, 645g, packs down to 4.3L and only cost 200€ shipped to Europe (including customs). I have it and haven’t had a chance to use it in any real cold climate but it worked well in the Spanish Sierra Nevadas last month.

Reddit IconPNW1441
3 months ago

I just got mine, finally. It seems very comfortable and warm and will replace my S2S ultralight which did not work for me.

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