Come on. The OR alpine is 895gm. The Borah Cuben is 119gm. That saves 776gm. For that matter, my Locus Gear Khufu mid AND 2/3 custom bug inner with Cuben floor together weigh less than the OR Alpine, and I get much more space and a vestibule...
rmeurant@rmeurant - can you create a new poll with just the bivy sacks that are truly ultralight? Borah Gear, Zpacks, Locus Gear . . . That would be really useful and I can include it in an upcoming email blast later this week. Thanks!