Tim I don't know about the Doobie as I have only used the Woobie. The difference is that the Doobie uses the 20 degree insulation weight while the Woobie uses the 40 degree weight. I like using the woobie in warm weather as I prefer a blanket type sleep system. When it gets cold enough to use the Doobie I prefer a sleeping bag. I like to be able to vent and spread out when it's warm and when it's cold I like to be able to cinch it up and get all snugged down for the lack of a better term.

I know as far as the extra money the Woobie is it is worth it to me for how much warmer it is over a poncho liner. Especially when I don't want or need the weight, bulk, or temp rating of a bag. I've froze too many times in a poncho liner so the money for the upgrade was worth it to me.

Last edited by remington79; 06/03/11. Reason: added text