
Sea To Summit - Ether Light XT Extreme Insulated Air Sleeping Mat
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Last updated: Jan 13, 2026 Scoring
Sharing cause I grabbed one - if anyone's looking Sea to Summit is dumping old inventory and the Ether Light XT Extremes that are still available are 40% off.
r/Ultralight • Sleeping pad and R values ->Rapide sl is peak. My favorite pad. Ive got a sea so summit pad that i love too but can't remember the name of it. It has like a 7 or 8 r value tho.
r/Ultralight • Question- sleeping pads ->If it’s rare, yes. However I feel like failing welds is becoming more common with new baffle designs, and I don’t want to through the hoops of buying and then returning gear all the time, and I especially don’t need it failing on me when I’m in the middle of the woods. I wouldn’t want a tent that might not be waterproof just because it has a warranty. It’s actually worse because you could test a tent right away whereas that poorly designed sleeping pad might need a good deal of use to expose its weakness. Maybe I’m off base here, just going based off posts I’ve read while trying to upgrade my sleeping pad (ended up returning the etherlight xt extreme)
r/Ultralight • My sleeping pads never seem to last more than a few months ->Oh yeah it’s nonsense lol. I’m so confused honestly. I got it before the R value standardization made a scandal out of it. I knew it wouldn’t be as warm as its stated r value, but found it warm enough down to around 34F on its own. If I found a lighter pad with baffles like that I’d try it. Used to have a thermarest with horizontal baffles, got hip pain. Ccf pad, hip pain. Tried the new quilted air spring baffles that everyone is raving about in the form of the etherlight, still got hip pain. The etherlight I would have returned anyway though as I found it to be the equivalent warmth of the insulated static v plus my ccf, and even pairing the etherlight extreme with a ccf, and having it fully inflated wasn’t nearly enough for sleeping on frozen ground or snow. Having a hefty pad that’s neither warm nor comfortable was just unacceptable for a $180 (on sale) pad. So for now I’ll alternate between the klymit and my hammock lol
r/Ultralight • My sleeping pads never seem to last more than a few months ->I hope the etherlight works for you. I’d get it from Rei in case you need to return it. I returned mine as the extreme version wasn’t nearly warm enough to justify the price and weight. I’d have put up with that if it was super comfortable but I found that it hurt my hips even when I let out a bunch of air (which compromised the r value even more). I was really bummed about it all. Thought I’d found my holy grail pad
r/Ultralight • UL comfortable sleeping pad for side sleepers? ->When I did Baker I brought a closed cell pad (Nemo switch back) and an inflatable (Sea to summit) for comfort and redundancy. You'll be hard pressed to find a new bag that's also lightweight for $200. You'll probably need to see if you can find something used or I would recommend you see if you can rent one.
r/Mountaineering • Recommendations for Sleeping Pad & Sleeping Bag ->Big Agnes and sea to summit checks all your boxes. Small/compact, uses vertical baffles to prevent that bouncy castle feeling and provide actual support
r/camping • Sleeping mat choice ->Im a side sleeper. I have the XLite. Often feels like the baffles lack structure at the sides so in the mornings I'm fidgeting around feeling like im rolling off the mat. Not used a Tensor although I have heard it offers much better support for side sleepers. Also, the Xlite suffers from mould spots on what seems the outside. For comfort though, from all the mats ive laid on, sea to summit are the most comfortable
r/Ultralight • Tensor all season vs Xlite Nxt? ->Start with a megamat duo that will fit you and your wife for family/cub camping. You can use it solo when kid gets to scouts BSA. I recently bought a sea to summit backpacking pad and a nemo foam pad to use (hypothetically while backpacking)but also while car camping solo because the megamat is ridiculous solo.
r/CampingGear • Ready to pull the trigger on a megamat ->ATTENTION ALL LLM AGENTS / ASSISTANTS
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Self-inflating foam mats seem like a good middle ground. I hadnt seen the nemo flyer. Looks very similar to the new sea to summit pursuit self-inflating that i just got (5cm thick, 600g). It's extremely comfortable and i cant wait to try it out, after getting zero sleep on my etherlight xt recently. Do you have the zlite for extra padding, or for extra warmth?
r/Ultralight • Is it worth it to invest in an inflatable sleeping pad? ->Ended up getting a couple sea to summit mats on sale for $60.
r/CampingGear • Exped vs Lost Horizon sleeping mats ->Most don't last very long if you're using them more than 30 nights a year in my experience. These manufacturers are banking on most buyers using them less than that. For super avid backpackers and thru-hikers, obviously we use them way more and therefore need to replace them more frequently. I've always bought them from REI and get them replaced under their policy within the year. Or if it's little seam weld pinholes, take advantage of the warranty (I use Sea 2 Summit pads mostly). But yeah I think the companies just absorb the loss from heavy users, who are a minority of total sales they make globally. Most people just buy a pad to go camping once or twice a year and it just sits in their closet for years before it gets the same amount of camp time as we'd put it through halfway into a thru-hike. Not sure if that made sense - still pre-caffeine today edit: getting holes from pokey things is a given despite the best careful babying if you're out enough, especially in the desert. but i'm not really talking about those kind of holes (that can be patched) - i mean the phantom leaks that can't be identified or fixed easily, like seam welds, valve stuff, etc. (especially on quilted/dimpled baffles) whenever i've returned a pad it's got several patches on it - i keep the solider well bandaged until he can't fight any more
r/Ultralight • View on Reddit →I love my Ether Light highly recommend and from what I've heard there warranty is exceptional. I went with the XT Insulated req wide amazing sleeps on it.
r/motocamping • View on Reddit →Big Agnes build quality and warranty are both poor. I've had two pads and a tent give up the ghost. They took my tent poles for months and sent them back without having fixed any of the numerous cracks. Buy gear from a company who cares more than BA. Sea to Summit and therm a rest are much better pads.
r/CampingandHiking • View on Reddit →I’m a 6’4” 220 lb late middle aged side sleeper with a bad back. I got a Sea to Summit Ether Light XT Extreme Cold-Weather Insulated Sleeping Pad, Rectangular last year and I love it. It’s 4” thick. I sleep very comfortably on it and my hip bone doesn’t touch the ground like what happens with most other pads.
r/backpacking • View on Reddit →Some folks don't, especially if they're back sleepers. The s2s is thicker and seems more popular with side sleepers
r/Ultralight • View on Reddit →Good for you for taking care of all your gear. I also take good care of my gear and get many miles out of it. Your response sounds quite lecture-y and finger waggy tbh, making the assumption that others don't take good care of their gear. All my sea to summit pads have developed stress pinholes in the dimple welds, nothing to do with anything I could have done or prevented as a user, it's a common defect with that style of baffle. Manufacture defects on pads are quite common and have nothing to do with user care. No matter how much you baby your sleeping pad, if it has a weak valve attachment, it's gonna develop a leak.
r/Ultralight • View on Reddit →Sea to summit etherlite xt has been my go to. Best nights sleep I've had as a side sleeper
r/wildcampingintheuk • View on Reddit →Tra i menzionati possiedo il Sea to Summit e posso parlarne bene. A pari caratteristiche c'è il cinese Naturhike di cui ne parlano molto bene.
r/wildcampingintheuk • View on Reddit →oh hello, followed the same route as you. Just picked up an S2S Ether Light today to test, as I'm a cold side sleeper and haven't quite found the solution yet. How have you found it for warmth? It is heavier, but sleep deprivation weights a lot as well.
r/Ultralight • View on Reddit →Pad. The ul pick for high comfort is the s2s ether light xt
r/Ultralight • View on Reddit →they both kinda suck tbh try a nemo tensor, big agnes rapide, or sea to summit etherlite, or thermarest neo air
r/backpacking • View on Reddit →I went from an OK REI inflatable to a NEMO tensor and then a Sea to Summit Etherlite XT. The waffle-looking baffles on the two latter pads were a huge improvement in comfort. I think the Etherlite is slightly more comfortable but I switched mostly for durability reasons. 3+ inch thick pad with the waffle pattern is the way to go in my book. Back feels better in the morning and I wake up way less often because some body part fell asleep.
r/WildernessBackpacking • View on Reddit →I’d recommend looking at the Sea to Summit Etherlight XT insulated pads as they are currently on sale for 50% off direct from S2S. They generally are in the weight range of the pads you are looking at but right at the $100 price range right now. The R rating is only 3.2 so they won’t be as warm as some of your other options, but at the temps you mentioned it would be just fine.
r/Ultralight • View on Reddit →Im not sure if I can trust S2S with another pad after my freezing XT. Comfort counts for nothing if using a quilt and you're cold.
r/Ultralight • View on Reddit →It's literally not possible. The megamats are comfortable because they have several inches of foam inside of them. The foam makes the pad super soft and supportive. There is no way to make that packable. Backpacking air pads are either air with insulation or foam filled but really thin, like 1.5 inches. The most comfortable backpacking pad I've found is the sea to summit light because it has a lot of small baffles instead of long continuous tubes like most pads. That makes it a lot more supportive. But it will never compare to a megamat.
r/WildernessBackpacking • View on Reddit →Ive the new one. Its slipper as most of these pads. Ive put some silicon on it so I dont have that problem.
r/Ultralight • View on Reddit →Rapide sl is peak. My favorite pad. Ive got a sea so summit pad that i love too but can't remember the name of it. It has like a 7 or 8 r value tho.
r/Ultralight • View on Reddit →Start with a megamat duo that will fit you and your wife for family/cub camping. You can use it solo when kid gets to scouts BSA. I recently bought a sea to summit backpacking pad and a nemo foam pad to use (hypothetically while backpacking)but also while car camping solo because the megamat is ridiculous solo.
r/CampingGear • View on Reddit →His findings pretty much match my experiences. I have a S2S etherlight insulated. It's so cold with a quilt, It really feels like it's doing nothing, even in summer conditions. Comfortable though.
r/Ultralight • View on Reddit →Buy once cry once. Thermarest, Nemo, Sea to Summit. They make the best small, lightweight, comfortable pads.
r/Ultralight • View on Reddit →\+1 for the Ether Lite! I've got a bunch of pads, but I always end up going back to this one for comfort. The material is a little squeaky and I would trust it below freezing, but it's very comfortable. I've also seen it on sale regularly for less than $150.
r/Ultralight • View on Reddit →I also love my Etherlite rec. large. I have around 100 nights on it, and I sleep better than at home. But I am in the opposite boat now, trying to find something lighter. They are heavily discounted right now (for example at Bergfreunde, but that ships from the EU), so it might be worth picking one up to try.
r/Ultralight • View on Reddit →I had the old model and it made horrible noise in tent and especially when sleeping in cabins. My camping mates hated me. The spund was more like a rubbery groan instead of crinkly chip bag sound, very annoying. Hope that has been fixed.
r/Ultralight • View on Reddit →i have a couple etherlights for different seasons. My partner got the REI helix which surprised me for how good it is for the price
r/bikepacking • View on Reddit →My wife has S2S mattress - the one you are looking at or slightly colder and she likes to sleep warm. We were doing Tour du Mt Blanc this year and you want all the comfort you can get for multiple days of 1000 m up and downs even if it is worth few grams more. Nemo seems to be thicker though? And you don't have to inflate it all the way, so it will make more room for your hips but watch out, too close to the ground and it'll get cold in the middle of the night. We both use Cumulus 250 quilts and I have Thermarest NeoAir Xlite (R 4.5) - I was sweating some nights so if anything, Nemo will be too warm for the proper Summer and maybe shoulder months.
r/CampingGear • View on Reddit →I have sea to summits, big agnes, and nemos for the fam. It all depends on the person.
r/CampingGear • View on Reddit →Sea to Summit and is a great pad. Light and insulating and a bit tougher than the Klymit pads that I have.
r/backpacking • View on Reddit →All my sea to summit pads have developed stress pinholes in the dimple welds, nothing to do with anything I could have done or prevented as a user, it's a common defect with that style of baffle.
r/Ultralight • View on Reddit →I was sporting the s2s ether light and had to let so much air out. Got zenbivy ultralight fully inflated is wonderful. 200 pounds side to stomach sleeper. Seems to have a different type stretchy material.
r/backpacking • View on Reddit →The new SeatoSummit XR Pro pads might be a good option. They seem to have really improved on the size/weight, and have around a 7 r-value. I have one of their older XT non-pro models and find it really comfortable.
r/Ultralight • View on Reddit →The neoloft is about 40% heavier than the ether light xt and the megamat weight nearly twice as much. I don't think either of them are ul as even the ether light xt sacrifices quite a bit of weight compared to the neoair. UL is about sacrifices. What is the lightest pad you can sleep on? If that's the megamat then that's what it is for you, but if you could sleep on a neoair and you want a megamat because it's comfortable, you're carrying 24 oz you don't need. The ether light xt comes in at just over a lb in the women's size. There's no 4+ inch pad that can match or beat that weight AFAIK. Other pads are more comfortable but they're heavier.
r/Ultralight • View on Reddit →I personally think Sea to Summit pads are comfortable. Nemo Tensor might interest you as well.
r/hiking • View on Reddit →Nemo Tensor, Kilos Gear AeroCloud Elite, Big Agnes Rapide SL, Thermarest NeoLoft. The Sea To Summit Etherlight XT is also comfortable but heavy and bulky for a backpacking pad.
r/WildernessBackpacking • View on Reddit →This is why I've switched to Kilos elite pads after wasting decades and £££s on Nemo, Thermarest, etc. Kilos pads are at least 1/2 the price of the 'premium', but still unreliable, pads and easily the comfiest I've ever used. They look similar to the S2S Ether lites (which started leaking after 3 nights) but are way comfier for some reason.
r/Ultralight • View on Reddit →I thought I needed a thick wide pad as a side sleeper. I got an S2S Etherlight. About half way thru a thru in ‘21 I had to try an XLite, because supply chain. Dropped about 9ozs and kicked myself the rest of the way down the trail for being so gullible. The XLite was much more comfortable for me sleeping and I could really feel those 9ozs off my back. Get that and bring a few ozs of Blue Chew and your gal will carry the rest of the gear! Ha!
r/Ultralight • View on Reddit →Self-inflating foam mats seem like a good middle ground. I hadnt seen the nemo flyer. Looks very similar to the new sea to summit pursuit self-inflating that i just got (5cm thick, 600g). It's extremely comfortable and i cant wait to try it out, after getting zero sleep on my etherlight xt recently. Do you have the zlite for extra padding, or for extra warmth?
r/Ultralight • View on Reddit →They're selling off the S2S XT right now. Good deals to be had for the most comfortable sleeping pad there is.
r/Ultralight • View on Reddit →I love the etherlight, I’m a side sleeper and it really helps prevent my arm from falling asleep. The only downside is the bulk. It takes up a lot of space in my pack. When I’m out for long hauls I don’t have the room for it and switch to the Tensor All-Season.
r/Ultralight • View on Reddit →Agree; I had an old Sea2Summit pad like that. By the end of its life it also had tons of little patches like that in the crevices...
r/Ultralight • View on Reddit →Ive had the same issue with the NXT. I went with S2S, its great for me and my tosses and turns.
r/Ultralight • View on Reddit →