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For Therm-a-Rest NeoAir Pump Sack, 86 customer reviews collected from 1 e-commerce sites, and the average score is 4.3.

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7.11.2018

Its a little more than I'd like to pay for a pump bag, but was one of the only bags out there that would fit my older pads and Klymit pads (yes, I have a collection). In particular, I have a down pad with an older Thermarest nipple/threaded valve that this bag is designed for, and I needed a pump sack to avoid filling the pad with moisture from my breath (previous Instaflator tore). The bag's "valve" is a relatively thin, pliable piece of clear stretchy plastic about the size of a silver dollar with a hole smaller than a dime. The hole is small, but stretches over the pad's valve to form a seal. A little jostling of the bag will help open up the interior with a large breath to help get the most air in,and from there, its easy and efficient to fill up the largest & thickest of camping pads. Takes 4 bags of air to fill my full length 3" thick pad, which would otherwise be well over a dozen full, hard breaths.I also worry about the longevity of the clear plastic that creates the seal. I wouldn't want to use it on a real large valve and then also have to use it on smaller valves. I believe it might fit some of the larger Coleman valves after a little work getting it on, but that will stretch it out enough to make the hole bigger and might make it unusable on smaller valves going forward. If used on one normal sized valve only, my guess is that its relatively durable over time.p.s. a lot of pads are now using flat valves and thus, have pump sacks to work with those valves; probably explains why this bag was hard to find in stores in my area; my guess is those valves are more reliable because they don't stick out from the pad where they could break or create a leak; so, I wouldn't buy this pump sack unless you have a pad you know you can use it on.
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24.11.2013

I use this to blowup our Thermarest Neoair Xlite mattresses. It does the intended job well enough, but it has it's downfalls as well.It's a big sack with a hole in the bottom that slips nicely over the inlet on the mattress and it seems to stay there. The sack is best used by attaching it and then using your hand to open the middle of the bag up, then quickly seal in the air by rumpling and rolling the sack up towards the inlet of the mattress. This collects the air well and quickly forces it into the mattress.This action is fairly exhausting after two mattress and a full day of hiking, however it's still MUCH better then using your lungs! It's also MUCH faster then lung power (my wife and I had a race,her super lungs vs my super sack (heh) and I won handily) .An issue with the huge pump sack is that it's impossible to use inside a backpacker's tent (bag and mattress and room for you to use are stacked end to end). This means that you and sack are outside of the tent in the dirt, blowing dust around and trying to keep everything clean.As a seat (rolled up mattress inside it) it's only okay. It's a bit hard to gracefully stuff the mattress inside it and then get the right amount of air inside the mattress to make it stable and it never gets fully stable, so you end up sitting and balancing. That said, once you do get the air right, it makes a decent seat that I would not have with me otherwise. Once again however, your mattress and pump sack are in the dirt.In the end you have a voluminous sack that serves more then one purpose, as long as your willing to be a little dirty and make some concessions.
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14.12.2012

This sack was purchased for exactly what the name implies... pumping up a Thermarest NeoAir mattress. It is intuitive and works flawlessly; quickly, manually, inflating the air mattress with dry air thereby reducing deflation when the temperature drops and condensation kicks in. The item picture doesn't really provide perspective on how big the item is. I was expecting a stuff sack, but this thing is closer to a (small) bag liner. Its certainly a lot bigger than it needs to be to inflate the air mattress.The reason for the extra size is probably tied to the bag's chair functionality. But the chair is not for me. For starters,its a little tricky and time consuming to make the chair (you've got to fill the air mattress about half way and orient it correctly)... to a point where one would never really consider constructing it except for overnight stops. Then, once the chair is setup, its neither supportive nor that comfortable. Its better than nothing, I suppose, but Thermarest has other mattress-based, chair-specific alternatives that weigh next to nothing, take up almost no space, and do the job better, in my opinion.Bottom line, I like the Thermarest NeoAir Pump Sack. 5-stars, for me, would be a stuff-sack sized version of the exact same item that makes no effort at being a chair. But the ability to quickly, manually, inflate an air mattress with dry air while eliminating the huff-and-puff still makes this a very good product.
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15.8.2015

This product showed up on time and pretty quick and I choose the free slow shipping, but it may be the area I live in is just close. I have to say I just received so please keep that in mind. I have a trekker sleeping pad, and I filled the trekker with this pump sack with only four gulps of air. I took my time and expanded the bag out and then closed it off and slowly rolled and yeah it only took four times to fill the trekker. I've filled the trekker by mouth and it's not bad or hard but I could feel the condensation and heat around the mouth piece and that does worry me; I camp in the snow. The bag is much bigger in person from the picture,I did not realize but you can put your sleeping mat in the bag rolled up with some air in it and it works as a seat, so kind of an added plus. I don't think it's wise to use as a stuff sack but you could stuff it with what not for a pillow at night as well. It is a little pricey, but taking into account it could prolong the life of your sleep pad for us winter hikers/campers I think it worth it; just looking at the big picture.Neo Air trekker stacked on top of my old Army self inflating sleeping pad, I must be getting an R value of 5 out of a possible 9.5; worth the weight. Just cut the weight somewhere else.
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22.10.2014

This is one of those ideas that is so simple that it made me think, "Why didn't I come up with that?" I love technology that is completely passive - nothing to plug in, nothing to break. One of the things I find a real hassle on my canoe trips is blowing up my sleeping mat. After a hard day of paddling and portaging its the last thing I want to be doing. This little bag completely eliminates having to do it. Not only is it faster and easier, it also avoids blowing moist air into the mattress. The sack itself is well constructed, weighs almost nothing and packs away very easily. If you were clever you could probably come up with something else you could use it for but I'm fine using it just for this.Highly recommended.I should add this. When I bought the sack I already owned the air tap nozzle that I was using with a plastic bag. I wanted something more permanent and durable than the plastic bag so I bought pump sack. I then attached the nozzle to the pump sack and it works incredibly well. With the nozzle attached I have no trouble with the sack becoming disengaged from the mattress while inflating
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15.9.2017

Ok - I tried to ask a few times if anyone had tried this with a non-Thermarest type sleeping pad, and I received no replies. So I purchased it to see if it would work with a Nemo "Tensor" type valve and I can say that it does work fine. The valve on a Nemo is like the older valves most manufacturers used to use i.e. a twisting plastic barrel style valve.The NeoAir Pump Sack has a clear plastic insert hole just under the bottom handle and there is no mechanism to connect, you just push the valve through the hole in the clear plastic and go to work. Simple, easy and a whole lot faster than using your own lungs and getting hyperventilated. I venture to say it would work with just about any pad with a barrel style valve.The only thing I could see that might be an issue, and I don't really think it is, is if the plastic hole cracked or split easily, but really that should be a warranty item if that happened and it seems pretty tough in my opinion. If your looking for a pump sack that works with Nemo or other similar type barrel valves, I'd give it a try.
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21.6.2016

I've had the pump sack for a few months now and taken it on 4 backpacking trips. It works great. It doubles as a clothes sack for me to keep all my clothes dry in my backpack. One trip it rained the whole time and nothing in the sack ever got wet. There is a little bit of a learning curve when using it to blow up an air mattress, but once you figure out the best way to do it, it works great!I do like the fact that using this I can keep moisture out of my air mattresses when inflating them so they will last longer and I don't have to worry about mold, mildew, or bad smells being in the air mattresses. It's very light weight and compacts down to a very small size with nothing in it.I do have a little concern with the plastic piece that fits over the air valve on Thermarest mattresses,and whether or not it will last a long time without getting stretched out to the point where it won't stay on the valve by itself any more, but time will tell. For now it stays on fine as long as you make sure to push it all the way down on the valve before starting.
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25.1.2013

Bought this to blow up my Nemo Astro Insulated Sleep Pad and it works great! The hole in the bottom that slips over the nozzle on the pad is a little tricky to get on (I imagine it will get stretched out over time) but it fits snug and seals well enough. It blows up my sleep pad in maybe three or four good fills (~1min), saves a fair amount of huffing and puffing, and keeps moisture out of the pad. I was pretty skeptical but it really does work. I also tried stuffing a rolled-up, half-inflated pad into it to use as a stool. It's easier if the pad is about 20% full with the nozzle up so you can give it a few puffs to fill out the bag once inserted. This should work well as a basic pack liner too.The fabric seems fairly durable and isn't so thin that I'm worried about tearing it easily. This could probably be a couple bucks cheaper, for what it is, but I'd still say I'm overall happy with my purchase.
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30.12.2017

I just got a Klymit Static Luxe V. It’s big and it takes a lot of breaths to inflate. I ordered the Klymit inflation bag but I found that it was way too long and skinny. Anyway, I didn’t like even though it worked. I saw a vids on this and saw that a reviewer said it worked on the Klymit, so I took chance and ordered it. I really like it. It’s wide and not too tall. It can be used in a small tent. It connected to my Klymit pad but it was a tight fit. Open the bag, shake it a little bit, blow in a little air, roll it up and squeeze. It took me around 4 bags to inflate the pad to my comfort level. It really works well.My one concern is the valve material where the pad’s valve is inserted.I can see this as the weak point of the system. If it cracks or splits, the bag fails. It’s made from vinyl and it’s designed to stretch over the valave. Only time and use will tell.Overall, it works
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7.4.2019

Bought this after one try at blowing up my Neoair venture using my lungs & deciding that was the last time I'd be doing that (& being slightly disgusted by the amount of saliva I was blowing into it).Works great as a pump sack - usually about 4-5 bagfuls will do it, & a final puff from me to get it full & sealed.This also now doubles as my waterproof backpack liner - it's the perfect size to fit an Osprey Exos 48! I've never had any issues with water getting in through the top or bottom.This bit of kit is expensive & weighty to use purely as a pump sack when backpacking, but doing double duty as a pack liner makes it worth the money. Not really suitable as an individual dry bag,as it's quite big & doesn't roll down well.Not tried to use it as a chair, & don't intend do...
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6.11.2017

Although I had this product in hand for some time, it was only last week that I got to check it out in a real live backpacking/camping situation. It performed exactly as advertised, and I am well-pleased. While in use to inflate the Thermarest mattress, care should be taken not to twist the Pump Sack connection from over the fill valve on the mattress, because doing so will obviously break the seal and prevent the air flow as desired. I have not tried using the sack for anything other than the air fill, so I don't have any comments regarding its use in that manner. It saved me having to blow up a mattress and get a headache as a result, so all good on that account,so any additional weight -and it was indistinguishable- was worth it.
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2.5.2019

Much larger than expected. It’s a whopping 40l! I thought it was going to be 20l, but I must have had it confused with another brand. On the plus side 2-3 bags fills my Xlite pad and it only adds a few oz to my pack. I top it off with one breath to firm it up. The outlet definitely seems like the weak link. I see how it could easily tear. It feels more secure if I pull it over the valve by pinching the flexible plastic rather than putting stress on the fabric/glue joint. Not sure how it will do in colder weather when everything gets stiff. A better outlet design would make this a 5 star product. Still worth buying since there aren't a lot of other options.

21.1.2019

It takes some care to keep it from coming off the valve but once you figure that out, it's quick, easy, and highly reliable. I prefer it over a battery pump which can fail. It's light and folds up very compact so it will fit in the mattress bag if I don't use it for a stuff sack.I've used it on 2 mattresses. One has a 5/8" valve and the other is 3/4". It will stretch to fit on either. With the 3/4" valve, it's possible to pull the pump rubber down over the mattress valve so it's around the stem and it won't come off as easy. The 5/8" valve has a smaller stem and the pump will leak so it doesn't work to do it that way.

28.10.2015

This thing works fantastic! I could see not wanting it for backpacking if you are trying to save ounces and this is really just a single purpose thing. But it works great. Pumped up my thermarests in as little as 4 or 5 pumps. I found that if you really got the hang of it, it could pump things up super fast. If you let air leak or didn't get a "full" grab of the pump sack, it took much longer. At first it may have taken me 20 "pumps" with the bag but then I could get it down to about 5 after some practice. I often car camp with the kids and they (ages 8-12) were able to use this well. Glad I picked this up.

13.2.2014

The pump sack has a stretchable plastic at the bottom. SImply stretch the plastic over the valve of the pad and use the bag to pump the pad up. With the Vaude Norrsken it only take 2 bags full to fill the pad up. The sack appears to be waterproof but i have not tested this. It's usefullness as a pack liner is debatable considering you would need to completely empty your pack in order to use the sack to fill your pad. Also it is a bit heavy to use a pack liner (I prefer a trashbag instead for its weight reductions). All in all a good product that works as described.
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