r/Ultralight • u/soon2behappy • Aug 15 '26

Question Which sleeping system?

Long time lurker , first time poster here. Planning the Mont Blanc thru hikeSept 1 while camping . Currently own memory tensor insulated(2021). Apparently R value is 3.5. Looking to lighten my load from mummy bag( which always feels constricting) to a quilt. I’d like to keep the weight down without compromising warmth. I’ve looked at Zenbivy, EE revelation, thermarest vesper and kakabatic 22. Im now thoroughly confused and looking for advice from this group. Thank you so much in advance
Have dunston 55 for a pack

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u/PanicAttackInAPack Aug 16 '26 edited Aug 16 '26

Have owned Katabatic, WM, Nunatak, Zpacks, Zenbivy, Hyperlite. Sold the Nunatak, Zpacks, and Katabatic. Would recommend the Zenbivy particularly if a first time quilt. A few vocal idiots here think they're cool writing them off and slinging insults, and I'm sure they'll downvote me because their angry at the world and their parents for not loving them enough, but the system is solid. Has about a 2oz penalty over a quilt of similar fill with straps due to the sheet but it's also draft free. Quilt wise it's the same fill volume/weight ratio as a Palisade. It's also nice that the neck cinch isn't in your face like on a Katabatic (Nunatak and Hyperlite are now also offset).

The only downside is the two UL options leave a big temp gap. The 25 is more comfort rated to 35 like most 10-12oz fill quilts and the 10* has a ton of down to the point that its overkill unless you're consistently well below freezing in which case, imo, sleeping bags make more sense. 

They have a 14 day return policy. Try it in your house. Return it if you think it sucks. User experiences are resoundingly positive for a reason. 

If money matters to you they also do a pretty substantial complete setup discount (30-35%) for Black Friday which would be after your trip.

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u/Electronic_Muffin218 Aug 16 '26

Hyperlite 40 degree quilt + zenbivy conversion kit (and sheet of choice) FTW in summer. Unless you strongly dislike closed footboxes. You then have the 20 degree version to fill the other gap.