REI Co-op Joule 21 vs Sierra Designs Mobile Mummy 600 3-Season Sleeping Bag for Women

With this bag you don't have to choose between a lightweight design or good insulation. This sleeping bag weighs only 2 pounds and two ounces so you will barely even feel that you even have it when going backpacking. Despite the light weight, it still keeps you warm in temperatures as low as 21 degrees.

This bag has increased room at hips, decreased room at shoulders and extra insulation in critical heat-loss areas.

Very good weight-to-warmth ratio is achieved thanks to the Water repellent 700 fill power duck down filling. Such high fill power is usually found on much more expensive bags.

The comfort temperature of the bag is rated in 21 degrees Fahrenheit while the survival temperature is as low as 9 degrees. This means that the bag can be used in a tent in wintertime without feeling cold.

You don’t have to worry about waking up in the bag all wet in rainy nights or misty mornings because the bag has waterproof coating.

A two-way zipper system lets you put your feet out and special toggles on the bag allows to secure the toe box up and away from your feet so that you can walk wearing the bag. Furthermore, there are arm ports where you can stick your arms out from the bag. This is perfect in those cold mornings that you don’t want to leave the bag but you need to start doing camping chores.

The down filling in a combination with the draft tube and provides a survival temperature rating of 15 degrees Fahrenheit. The comfort temperature is rate at 25 degrees so you use this sleeping bag during cold shoulder season nights.

You don’t have to worry about the bag becoming damp in rain or mist because the treated down resists moisture and the shell is made from water resistant polyester fabric.

The bag stretches and allows movement inside it, so you can sleep on your side easily without being in a claustrophobic position in the bag.