Shawn T.wrote a review of Sierra Designs Backcountry Bed 700 Sleeping Bag: 20F Down on February 3, 2018
Familiarity: I've used it several times
Very comfortable, room to sleep on side and back. If its hot, poke your feet out the bottom. Also can pull down the top and get increased airflow. It kept me warm on colder nights in Yosemite in the fall (30 deg low), but wasn't too hot or bulky for warmer summer nights (60 deg) when the weather was nice.