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The Big Agnes Insulated Air Core: comfy, light, packs down small, and keeps you warm.

Big Agnes added Primaloft eco to its wildly popular inflatable pad, the Air Core to create the Insulated Air Core Mummy Pad. By using Primaloft eco synthetic insulation, Big Agnes diverted plastic bottles from the landfill. The inflatable design on the Air Core means you get an ultra-cush 2.5-inch-thick sleeping pad that will keep you warm on chilly nights and yet rolls down to fit compactly in your backpack. A perfect complement to any of the Big Agnes cold-weather bags, the Insulated Air Core can be left inside the bag's sleeve, deflated and stuffed into the sack with the bag, creating a single, self contained sleeping system.

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Review Summary
37 4
14 3
7 2
1 1

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Big Agnes Insulated Air Core Sleeping Pad - Mummy

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Here's what others have to say...

3 5


My pad remains inflated after use with no punctures to date after 3 or 4 adventures. Keeps the underside warm on cold nights. It's also comfortable over uneven surfaces. Plus, it packs down to the size of a water bottle. 3 stars because I think this product could be cheaper.

2 5

Keeps Leaking.

  • Gender: Male
  • Familiarity: I've put it through the wringer

Comfortable when I got it, but I have patched it multiple times and it keeps losing air. It has been from 2 week traverses, to bumming hallways, to winter camping and ski traverses. But it doesn't do the job, in keeping the air in. Look elsewhere.

3 5

Ok, but problems

The pad is easy to use, packs small, is lite, great R-value and good price point. My only problem with this mat is I had used it once and the second time I took it out it was deflated when I woke up. I am guessing I just had a defective pad, I took it back and got a new one and have not had any issues to date. For the price this pad is an incredible value. Obviously I see there are other reviews with the same issue as I have mentioned so there must be something to it, but I have not had any problems yet with the rectangular model I also have by Big Agnes. I think I am going to check out Exped next because the Rvalue on their downmat pads is 8 and the price is not too far fetched.

4 5


This pad is great. It's very comfortable to sleep on and packs down extremely small. A little lighter than my Prolite Plus and much warmer and more comfortable. Hopefully it will prove to be as durable.

4 5

Good pad

I bought this to replace my old Thermarest. So far I love it, only thing is its a little heavier than the thermarest but definitely nothing to freak over.

I have a petite women's big agnes mummy,...

Posted on

I have a petite women's big agnes mummy, which i adore. but i'd like to switch over to the sleeping pad that will fit into my sleeve- does it have to be a petite, women's, mummy sleeping pad?

Responded on

yes it would have to be a Petite mummy.

Responded on

Not necessarily. If you have one of the new mummy bags with the 1/2 sleeve you can use any shape and length 20" wide pad. However, if you have one of the original full sleeve mummy bags, you'll need the petite mummy pad.

Does backcountry price match?

Posted on

Does backcountry price match?

Responded on

Backcountry.com does not have an official price match policy, but if you call their customer service line at (800) 409-4502, they will sometimes consider price matching on a case by case basis (some sites can offer lower prices but are less reputable or do not offer the unlimited return policy, which is basically a lifetime warranty, that Backcountry.com does).

5 5

No more rough nights

For the first time I have found a sleeping pad I can actually get through the night with no discomfort. I have gone through multiple sleeping pads and would always wake up with my hips sore.

I am impressed it also packs down smaller than other pads I have had, yet it is much thicker once inflated. It also fits back into the stuck sack with ease, were as other pads are a chore to figure out how they fold back up.

My experience with it has kept me warm in 20 degree weather. If it gets colder than that, I have always taken an additional closed cell pad but I may not need it.

I do have a Big Agnes bag for which it was intended to fit, so I cannot say how they work with other sleeping systems. My friend who has the same pad says it works well with his bag which is not a BA. And as for complaints I really have none, it does take awhile to inflate but taking a few minutes to inflate it to ensure great sleep doesn't bother me a bit.

4 5

The most comfortable pad I could ask for, BUT...

This thing is amazing for sleeping and I am certainly the envy of the tent, but I think it is too big to take on serious backpacking and ski touring trips. Even though it rolls up super small, it is a pain to pack up into the bag sometimes and much harder to inflate compared to the thermarest inflatables. I use this when sleeping at a friends, on the floor of a cabin, or in the back of my Toyota and I bring the thermarest into the woods.

If you don't mind the long inflation time and want the extra comfort, though, this thing is perfect.

5 5

Love at First Sleep

  • Familiarity: I've put it through the wringer

I spent a night on this in about 10degree weather and I think it is safe to say it is it saved my but. It really keeps the heat in well.
1 year and 3 months later it has started to leek. Not a big deal life time warranty. still a great pad

5 5

What else do you want?

This is my Second Big Agnes sleeping pad and I am absolutely thrilled by it. I was hoping to sleeping in a Quinzee the other night but couldn't get enough snow to build one (Its cold here but barely any snow yet). So instead I went out onto the lake and set up a tarp. Together with my Sleeping pad and Big Agnes sleeping bag (Yellow wall sl) I was really warm.

The only thing is that the 2.5 inch sleeping pad takes a bit longer to blow up at night and then roll up in the morning. But I am willing to spend the few extra minutes doing that because it is so compact and so comfortable!

Great Product.

RE: Big Agnes insulated core sleeping...

Posted on

RE: Big Agnes insulated core sleeping pad.How does this pad inflate or is it self inflating? Is it light weight for backpacking? Buying for gift... I have no clue on this stuff!

Best Answer Responded on

this model requires the user to blow it up. air pads, like this one are traditionally the lightest and most packable pads you can buy. they, however, are not the warmest. as inflatable pads go, this is a good choice. you might also look at the thermarest neo-air pads. if you are looking for one that is self inflating, i have had the stoic lightweight step pad for over 2yrs now and love it. people also rave about the thermarest prolite self inflating pad.

How do you inflate this pad?

Posted on

How do you inflate this pad?

Best Answer Responded on

you open the valve and blow.

3 5

has a leak after one trip. :(

I seriously thought this pad was the answer to my prayers--I used it on a Denali trip and slept better than I ever have winter camping (with a foam z-rest underneath for insulation); it was so cushy and comfy and after all those good nights of sleep I would welcome the three minutes of heavy breathing it required to blow up every night, because it meant I was going to sleep like a baby. But alas, after that one trip it developed a sneaky slow leak that I haven't found yet. I will put it in a bathtub and find the leak and fix it of course but just was hoping for some more durability--I have used Thermarest pads for years and never had a single hole or leak or issue.

3 5


I had this pad and I can say that I was not happy with it. I felt like I was sleeping on PVC tubing. I let some air out but was still uncomfortable. I switched to a Big Agnes Two Track and was much happier and more energetic

3 5

Warm, but hard to stay on

If you are like me and have a hard time staying in one place all night, you should probably go for the rectangular style instead of the mummy.

I owned this pad back in 2006, and took it out on a snowy Spring day above 10K feet. My first issue was that I couldn't find level ground, and had to settle with a slight downward slant for setting up my tent. I then spent the whole night sliding off my sleeping pad, or waking up with only half my body on this pad. This is mostly a personal problem, but someone like myself should stick to the 'wider is better' version.

Responded on

You should consider getting a Big agnes Sleeping bag, with this pad you can slip it into your bag in a secret compartment and it will not move on you. :)

Responded on

Thanks for the heads up -- unless squashed between a pair of linebackers, I'm a shaker and a mover who happens to own a phenomenal Marmot mummy bag. Buying a new sleeping bag doesn't make sense, but I think I'll go for the rectangle pad to reduce time spent on the ground. Maybe I'll buy some bungees while I'm at it.

5 5

Great pad, better price

I am really happy with this pad. I have used it several times winter camping. I have had a cheap closed cell pad under it and I have stayed extra warm. If I could do it again I would probably not get the mummy style pad unless I had a Big Agnes bag that it fit into. But overall I love the pad, its comfortable and warm.

5 5

A Difference Maker, for your trip!

This sleeping pad is the difference between roughing it, and actually getting a good night's sleep! Getting off the ground, with the built in insulation, allows you to comfortably fall asleep, beginning the first night of your hike, and feel rested when you get up to face the next day;all through your trip. Add in the fact that it is incredibly light and packs really small, and you cannot beat it! You will not regret the investment in this great piece of gear, and you will never go back to another sleeping pad.

What about punctures? Is this a worry? ...

Posted on

What about punctures? Is this a worry? Are they easy to fix?

Best Answer Responded on

Just like with all inflatable pads, you have to try to avoid sharp objects like rocks, etc, but it's not a worry. Comes with a repair kit, and in the unfortunate case that you need to use it, it's no big deal and only takes a few minutes.

5 5

Good Sleep

Not much more than I can cover that the other 5 star reviews didn't. I do not sleep well when not in my bed but this 2.5 inches of comfort really help. R Value of 4.1 means I don't feel the cold ground on my back which really comes into play with the Big Agnes sleeping bags. I leave the pad inside my bag and roll them up together. The only downside is the 5 minutes it takes to inflate this pad.

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