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SIM recommendations? (22 posts / 3,567 views)
Fortysteve Fortysteve
Posts: 734
Post #1 4 Aug 2020 15:06
0
Looking for a recommendation for a decent self inflating mattress. I had the Trakker offering, but it has started losing air over night, faulty valve I think.
I remember looking before, and they all seemed quite narrow. Really I need one atleast 60cm wide.
Thanks in advance 👍
carpy09 carpy09
Posts: 14,236
Post #2 4 Aug 2020 15:16
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In reply to Post #1
I use 2 of these inflatable mattress on my bedchair eBay item number 254673195913 you have to inflate them yourself but don't take much to inflate them and find them better than the normal self inflating versions
KnickerSniffer
Posts: 206
Post #3 4 Aug 2020 17:14
0
Go and buy a Thermarest. These people actually invented them and are proven, like proper mountaineering proven.

I've one that still works great that I've had since the 90's - not big enough for my bedchair. Thermarest are like...mustard.
g4fne g4fne
Posts: 15,110
Post #4 4 Aug 2020 19:56
0
In reply to Post #1
As said Thermarest is the best ... there are cheaper alternatives from the likes of Mountain Warehouse etc which will do a job aswell
Baza1075
Posts: 552
Post #5 5 Aug 2020 22:28
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I use an Andes one from eBay. Makes my ancient old bed nearly comfortable
Fortysteve Fortysteve
Posts: 734
Post #6 6 Aug 2020 00:06
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Thanks for the suggestions lads, I'll have a look 👍
stuart666 stuart666
Posts: 4,779
Post #7 6 Aug 2020 07:47
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Ive used a mountain equipment and thermarest one for years with no problems. The wife has a cheap one and thats lasted years as well. At the end of the day its a foam filled inflatable mat so any of them will do.
daveman daveman
Posts: 2,377
Post #8 6 Aug 2020 08:09
0
In reply to Post #1
I got mine in Millets, found one that fits within the raised padded surround of the bed, no carp tax and makes my bed really comfy
Baitman Baitman
Posts: 5,233
Post #9 26 Mar 2026 21:06
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3/4 length sim from thermarest.

My sim is only 3/4 length and 50cm wide but it almost fills the centre width of my bedchair and supports from shoulders to below hips, thats where all the weight is.
If its too wide your body weight will push all the air to the side and it will just bottom out.
If its too long the same happens...

20231027-153123
0nslow 0nslow
Posts: 1,618
Post #10 27 Mar 2026 05:11
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Pretty happy with my army surplus SIM and only cost 18 quid 👍
vossy1 vossy1
MODERATORMOD
Posts: 9,046
Post #11 27 Mar 2026 07:31
0
Thermarest are very good and it's reflected in the price. There are quite a few at 60cm from different manufacturers, I looked a while ago.
Personally I now use Outdoor Revolution as used by a lot of camper van owners but before I had the Mountain *Equipment Helium 3.8 as rec by Gerry on here but it's sub 60cm.

Have a good look at reviews, the new trend is for cyclone valves and some get terrible reviews, but, you really do need to keep them dirt/grit free or your asking for trouble, imo if you leave the valve open on packing up it'll fail.

I'm thinking of a new layer but I'm looking more at memory foam toppers or standard toppers in 2.5-5cm, bit overwhelmed by the choice tbh, just Argos for eg.

Edit, * said Warehouse 3...wrong!

stuart666 stuart666
Posts: 4,779
Post #12 27 Mar 2026 14:10
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Mountain equipment or thermarest, both excellent. Try to find one that fits inside the thicker outer padded surround on your bedchair. I use a ME glacier 5.0 on my wide solar sp bed. The 3.8 fits a normal size bed.
wandle1 wandle1
Posts: 7,469
Post #13 27 Mar 2026 14:29
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One company I would not recommend is Multimat ,I've had a couple of them and both valves have failed on me ,customer services in that company ,very poor

Multimat ,are true Sim ,not to be confused with full blow up thru hiker or wildcamping mats..

I recommend the Thermarest adventure mat ,coupled with a speed inflator/deflator, the deflate option game changer ,sucks air OUT ,quick ,which allows super reduced pack size, I never leave on a bedchair or sleeping bag for that matter..

Here is a idea, maybe purchase a large luggage compression bag ,put sleeping bag or whatever,use the mini pump to reduce pack size on barrow,storage etc..obviously you don't keep a sleeping bag scrunched for long periods,due to potential loft damage ..
116lee
Posts: 198
Post #14 28 Mar 2026 13:57
0
In reply to Post #1
Mine's from Decathlon, best I've had.
audiguypaul audiguypaul
Posts: 1,534
Post #15 28 Mar 2026 14:29
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In reply to Post #1
I've got an Exped MegaMat 10, not cheap but very confortable, inflate to your preferred firmness. It live on my Wychwood Tacticle X along with Fortis bag and I've had it for a few years now without issue.
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