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ALL ALTON PRODUCTS ARE COVERED BY A LIFETIME WARRANTY.* CLICK HERE TO LEARN MORE.
ALL ALTON PRODUCTS ARE COVERED BY A LIFETIME WARRANTY.* CLICK HERE TO LEARN MORE.
ALL ALTON PRODUCTS ARE COVERED BY A LIFETIME WARRANTY.* CLICK HERE TO LEARN MORE.
ALL ALTON PRODUCTS ARE COVERED BY A LIFETIME WARRANTY.* CLICK HERE TO LEARN MORE.
| Dimensions | 207cm (Length) × 82cm (Shoulder) × 29cm (Width Foot) × 29cm (Height Foot) |
| Material (Shell) | Ripstop Nylon with C0 DWR Coating |
| Material (Fill) | 850 Fill Power DownTek™ RDS PFC-Free Water Repellent Down |
| Dimensions | 81.5in (Length) × 32.5in (Shoulder) × 11.5in (Width Foot) × 11.5in (Height Foot) |
| Material (Shell) | Ripstop Nylon with C0 DWR Coating |
| Material (Fill) | 850 Fill Power DownTek™ RDS PFC-Free Water Repellent Down |
| 0°C | 390g/910g |
| -5°C | 505g/1044g |
| -10°C | 625g/1170g |
| 32°F | 13.8oz/2lb 0.1oz |
| 23°F | 1lb 1.8oz/2lb 4.8oz |
| 14°F | 1lb 6oz/2lb 9.3oz |
| 0°C | 25 × 15 × 15cm |
| -5°C | 26 × 16 × 16cm |
| -10°C | 27 × 17 × 17cm |
| 32°F | 10 × 6 × 6in |
| 23°F | 10.5 × 6.5 × 6.5in |
| 14°F | 11 × 7 × 7in |
1 × Ultralight Sleeping Bag
1 × Ultralight Compression Sack
1 × Down Storage Sack
Traditional down struggles in wet conditions. But this isn’t traditional down. Filled with DownTek™ PFC-Free Water Repellent Down that utilises bluesign® approved chemistry to achieve unprecedented levels of water repellency that stays dry 10x longer than untreated down. This means that your Sleeping Bag’s insulation retains full loft without wetting out, even when exposed to moisture. As an extra layer of protection, the durable ripstop nylon shell fabric is treated with a PFC-free water-resistant coating. Together, this results in an Ultralight Sleeping Bag that delivers reliable warmth in the most challenging environments.
The Ultralight Sleeping Bag has been carefully designed to maximise warmth without adding weight or bulk. The differentially-cut box-wall baffles help to prevent cold spots, while the mummy shape efficiently retains heat, but the square footbox provides some extra space to spread out. The adjustable hood and 3D draught collars at the neck and along the zipper line block heat loss through critical areas. Each bag is overstuffed by 15-20%, offsetting the effects of down loss over time so your Ultralight Sleeping Bag can be relied upon to deliver warmth and comfort, season after season.
Alton’s Ultralight Sleeping Bag has been used on demanding expeditions across Australia, New-Zealand, and abroad. It’s available in three ISO 23537-1:2022 certified temperature ratings, 0ºC, -5ºC, and -10ºC, that have been independently tested to guarantee accuracy. In keeping with industry standards, the ratings specified here are the lower limit, but we recommend choosing an Ultralight Sleeping Bag with a lower limit that is several degrees warmer than the lowest temperatures you expect to encounter. For more information on choosing the right warmth rating for your needs, please refer to our detailed guide to understanding the ISO standard here.
As an independently owned and operated Australian business, our priority is serving you, our customer – not lining shareholders’ pockets. That frees us up to focus on what we do best: building quality gear that performs in the wild, without taking shortcuts or over-inflating prices. Every product is designed, tested and produced to the highest quality standards, but by cutting out the middlemen and keeping our team lean, we’re able to skip the markups so you get high-performance outdoor equipment for up to 40% less than our big brand competitors. And to show you just how seriously we take our commitment to quality, all Alton gear is covered by the All Good Guarantee, a Lifetime Warranty* against defects.
Overall rating: 4.8 / 5 from 46 reviews.
I was in -0 last night, to keep this a quick review, it had taken about 1m for my body to heat up to complete fine comfort. There’s an inner tightening system so you can have it tightened around your neck/back. So breathing in the nice cold air and semi warmth, Help a lot.
Bought for winter deployment and to downsize my luggage. Suitably impressed
its been my bed for the last week or so. light as a feather but when you're in it, i immediately feel cut off from the outside looking forward to trying it outside.
Love this sleeping bag! So many great design features. Really enjoy the foot space and draw strings that hold the heat in. Allowed me go solo in the bush on cold cold nights and have a great time! Thanks Alton :)
Sleeping bag was so good had the best sleep ever.
Tested the new -10° sleeping bag out in my backyard the night it arrived! Love it! Can't wait to get it out in the bush this weekend! So comfortable and compact!
I have never shied away from sleeping in the cold until one particular night in the Victorian High country when i spent 2-nights freezing in what I assumed was a good quality sleeping system. I vowed never to be cold again and went and bought the Alton -10 sleeping bag. I tossed up between the quilt and the bag and in the end opted for the zip up bag. Needless to say, I have never looked back and now I don't even look at the weather forecast as long as I have my Alton sleeping bag to take with me. Now I have purchased the same for my wife and we both love the quality and knowledge that we will be toasty worm in any conditions.
very good quality and warm
-4C version. Love the toe box and have used it in anger a couple of times, looking forward to seeing how low it can go!
This sleeping bag will be with me for life! I’ve just taken it hiking with me in Tasmania’s wilderness and I am so happy with how light it is, warm and easy to store back in the sack when you need to pack up quickly! All my friends were very envious and will be looking to purchase one too!
My husband now can join me on our adventures 😀. Small pack, very warm, sleeping in a cloud!
Genuinely beyond impressed by the quality of Alton's gear. I purchased both the -10 sleeping bag and R6 sleeping mat. Super lightweight, well-thought-out touches that allow you to pack it up super small, and the insulation is insane. As someone who is normally perpetually cold, I was pretty much overheating; it was that snug. Couldn't recommend it more!
Have been using the -10 sleeping bag for about a year now. Comfortable, and has absolutely kept me warm on nights where temperatures have dropped to around -5. It can retain body odour a bit, so be sure to air it out and take good care of it. Highly recommend.
Camped in the snowy ranges and it dropped to -2. Had no issues being warm. I’m tall and didn’t have trouble moving around in the regular. Love the extra room in the foot pocket too. Lightweight and packs down small, would recommend to others.
Sleeping bag went well last week camping at Moscow Villa hut nunniong state Forest then the next night camping at Talbot ville in the ultra light 2 man tent. Warm sleeping bag, easy to get in and zip up, temps were 1⁰c at the hut and 2⁰c camping, for a mummy bag there is a lot of foot space, Great sleeping bag.
I couldn’t be more happier with this sleeping bag. It’s not only light but very warm. The head cover area has been designed perfectly ensuring your head stays warm, critical on those cold nights.
-10 sleeping bag. Took on a multi day hike in South Australia, had cold nights and a lot of rain. The foot end of the bag got a bit wet and yet I stayed toasty warm all night. Extremely comfy and well designed. Packs up easy. Very impressed.
I was really excited about the purchase of this bag for backpack hikes. The quality of manufacturing seems to be good. The overall shape and design is good. But calling this bag -10• capable is a far stretch from reality. I’ve just returned from a multi-day hike into a remote part of the Vic high country and had 2 sleepless nights freezing my butt off in this bag.. the volume of down just seems to be lacking.. unfortunately dissatisfied with the purchase. The 6R sleeping pad is great. But I think Alton needs to offer a more capable sleeping bag for sub zero conditions. I feel like 0• is more the extreme end of this bag’s capability.
Wow! Super roomy and so soft and comfy warm. Love it.
Highly recommend. Took it on an overnight hike and kept me toasty warm. Fairly compact and very lightweight. Bought the -10C for future versatility.
Taken the -10 out for several multiple day hikes and temperatures over -1 and it handled the nights effortlessly. Very comfortable, soft feel and very roomy.
ALTON -10°C Sleeping Bag Review: Warmth, Comfort, and Quality in Extreme Conditions After much research into cold-weather sleeping bags, I chose the ALTON -10°C Sleeping Bag, and it has exceeded all expectations. Whether camping in frosty alpine conditions or enduring chilly nights on the trail, this sleeping bag delivers exceptional warmth, comfort, and durability. Designed for extreme temperatures, the ALTON -10°C keeps you warm and cozy even in sub-zero conditions. The insulation efficiently traps body heat while maintaining breathability, ensuring a comfortable sleep without overheating. The ergonomic mummy-style design offers a snug fit without feeling restrictive, allowing enough room for natural movement while maximizing heat retention. The soft inner lining feels comfortable against the skin, and the adjustable draft collar further enhance warmth by preventing heat loss around the head and neck. ALTON is known for premium craftsmanship, and this sleeping bag is no exception. The high-quality shell fabric is both water-resistant and windproof, providing an added layer of protection in damp or breezy conditions. The stitching is reinforced, and the zipper is smooth yet durable, preventing snags and ensuring easy entry and exit. Despite its impressive insulation, the ALTON -10°C is surprisingly lightweight and compact. It compresses well into its stuff sack, making it easy to carry for multi-day hikes and backpacking adventures. For anyone looking for a reliable, high-performance cold-weather sleeping bag, the ALTON -10°C is a top-tier choice. Its balance of warmth, comfort, and durability makes it perfect for winter camping, alpine expeditions, and all-season outdoor adventures. If you want a sleeping bag that keeps you warm when it matters most, this is the one to get.
I bought this for the Larapinta Trail due to the zero c rating and it being an Aussie company. The down has a really strong smell of bird feather. I tried airing everyday but it still smelt to the point I wore my puffer jacket with the sleeping bag away from face. I'll never use it again. I contacted Alton and they suggested I was it. They also said that it's not unusual for a slight smell. I won't be washing it. I expected a bit better customer service.
Great quality. Have not used yet but looks warm.
Zero regrets. This is the best thing I’ve bought. It’s like a cloud. It feels amazing and I am so happy with it. Super comfy, super warm, easy to fit back into its pouch afterwards
Great product and keeps you toastie warm
Keeps you toasty warm and a great bit of kit.
So warm, perfect size, 100% quality 👌
Have only used once It was 4 degrees and I was toasty warm Great product
Bets sleeping bag I’ve ever had.
Love the feel and color of the sleeping bag. Very light and compacts much smaller than expected. Great value for money. Am interested to see how the quilt will compare.
Great sleeping bag used it first time and slept like a dream In -0 temp would recommend
Perfect for the upcoming Tassie winter! Super cosy and packs down well in my backpack.
It’s unreal. Kept me warm every night.
My son used this product for his recent school camp. It was fresh at night but he was super cozy. He said it was like sleeping in a comfy puffer jacket. The sleeping bag is really light to carry and the compression bag kept it small in size so it didn't take up a huge amount of space in his hiking pack. I am sure it will get plenty of use in the next few years.
Best sleeping bag I’ve ever owned Super lightweight and ultra comfy Compacts to a third of my last one Saving up to buy a second one 👍
Packs up small, very light. Very, very warm! Couldn't be more stoked
Super comfortable I have used it twice with no complaints
Perfect cold weather sleeping bag, packs reasonably small, super cozy. Love it!
Very nice quality, soft and comfortable, can't wait to test it out.
