You’ll always be prepared for a good night’s sleep on your backpacking adventures with the
This sleeping bag features a rectangular design to give you extra space so it’s great for restless side sleepers, it’s also wider at the hips and narrower at the shoulders to cater to women. To keep the weight down, the shell and lining are made from light breathable nylon that packs down small while the vertical chest baffles prevent the down from migrating. Filled with extra RDS 750+ ultra-dry down for superior insulation, with oversized draft tubes to trap heat, and THERMOLITE synthetic panels under the feet – the Altitude is designed to keep you warm.
You can keep cosy when it’s chilly and ventilate on a warmer evening thanks to the Free-Flow triple-zip design. The left has a half zip to free up your arms or fold it down, while the full-length two-way side zip and separate foot zip allows you to use it as a quilt. Or if you’re cold, close up the zips and snuggle down in the generous hood. While you’re snoozing, you can also keep essentials like your phone or headtorch handy in the large internal security pocket.
With a great balance of comfort and weight and a versatile design that can be adjusted according to the weather – the Altitude At1 from Sea to Summit will have you sleeping soundly.
Hi, just bought a sts trek2 bag left zipper from you, and love it. Wanted to buy a right zip now but it seems you don't have any. So looking for alternatives...this one looks good but definitely need a bag that will join the one I just bought.
G'day Andrew,
Mens/Unisex bags have a LH zip, and women's specific bags have a RH zip.
Can you confirm you've purchased a previous season model Tk2 - this one?
If that's the case, the only compatible models we currently have left instock are this Altitude At1, and the Journey Jo1.
Hello! Can you please confirm if this bag will zip to a Latitude LtII Regular Left hand Zip? Thank you so much!
G'day Rebecca,
Unfortunately they're not backwards compatible to the latitude bags, I'm sorry!
The Altitude is from a new season, and the zip coupling system was unique to the Altude backs onward.
I was wondering if the At1 would be warm enough to use for the Overland Track in March. I am tossing up between this bag and the At2 but also trying to keep weight and size to a minimum. Thanks
G'day Denise,
You should be fine with the At1 bag on the Overland Track in March, however you never know what will happen in Tassie! In terms of average temperatures you should be fine, however I've heard stories from colleagues who have encountered snow in January-March a few times in some sections, so it's worth considering your entire sleep system. If you've got a nice insulated mat, and some options for layers and a liner if needed then I think you should be ok.
Does the zip down the side run along the bottom so it can open fully flat? Looking to use it as a doona/mattress topper in summer when it's warm.
G'day Alison,
Yes you can fully open the Altitude Sleeping Bag up, there is a separate side and foot zipper so you can lay it completely flat, or unzip sections as needed.
Does this bag have any finger loops so it can be attached to a pad? It looks quite slippery material. If so how many loops?
G'day Bec,
The Sea to Summit Altitude At1 bag doesn't have any gear loops on the base to attach it to your mat. These bags generally aren't too slippery, but this obviously depends on the mat you use under it too.
Can this bag be attached to a sea to summit explorer bag to make a double bed or are they only able to fit the same altitude design, I understand if they are connected it will give an irregular shape
G'day Tyler,
You can definitely join together the Altitude and Explore
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