I use a Hyke & Byke Crestone 15. I really like it. I hike the PCT, so I don't really see freezing temperatures, but I'm a cold type and this is the only system that has kept my feet from bothering me.
I like how simple it is - no messing with a shifting UQ. I find that me and my Chihuahua have plenty of room, but your mileage could of course vary.
I'm not happy with my tarp set-up yet, but I'm thrilled with the H&B.
Bookmarks