I have a 13 oz event material from borah I don't think they make anymore. The current ones you would be sure to use under a tarp as the top is only water resistant. This one is less than $100 and 6oz. You really want to be under a tarp anyways as you need an air hole in the least and the rain will get in. Plus the pitter patter of the rain directIy on the bivvy is annoying. I have used mine a lot. Happy. Better deal than the commercialized brand names.What pad are you running?
Some bivies like ti goat dont accommodate thick pads well.
Borah gear is what I have and really like.
If you want one that can serve as a stand alone shelter something like the Outdoor Research helium would be good.
I slept many nights in an issue goretex bivvy. They are what made me believe they work. But I used mine in summer temps when they are less likely to condensate which I hear can be awfully bad with these.I use a military issue vortex bivy. Its not light, weighing about 2 pounds, but it was only $40 from a surplus store
Yeah, if your point is to reduce condensation then it wouldn't make as much sense.Moisture management on down is best without a bivy, IMO.
OR helium bivy is what I have, but also looked at the Ti Goat versions. Went with the OR version due to it being waterproof.
I looked this up. Have you used it? In high winds?What about something like a Kuiu Ultra Star? I know there are condensation issues but I would think these issues would be present in a bivvy as well? I like the idea of having some head room as well as a vestibule for gear.
I have not used it, I'm seriously considering one. I have heard a lot about the condensation issues and it's probably the only reason I haven't picked one up yet. I'm thinking of it more for scouting and warmer weather stuff. I have a 2P that I pack for colder stuff but it too is fairly heavy. I do use trekking poles so no issues there.I'm trying to build a setup for a 2200 ci bag for scouting weekends.I looked this up. Have you used it? In high winds?
Seems like a compromise like anything. 18 oz seems good but that's without stakes and assumes you use trekking poles instead of the carbon fiber pole. My tarp bivvy setup is similar. My standard but sturdy 1p tent is heavier.
My tarp bivvy setup probably condensates much less because I breathe into the open air instead of into a tent. My 1P probably also condensate less because it has two walls. The YouTube reviews for the KUIU complain a lot about condensation.
My tarp bivvy is much more versatile to setup especially since I can use the bivvy only. The tarp can be setup in any configuration as terrain and weather requires. This is clearly not the case with this KUIU but not the case with my standard 1 p either.
My 1p appears to be much more sturdy for bad weather. While my tarp is not, even if I lose my tarp, I still have my waterproof bivvy. Lose your ultralight KUIU tent and you're SOL.
The advantage would be you get complete enclosure unlike the tarp bivvy at a lighter weight than my standard two wall 1 p.