Moonstone is no longer in business, and the Maxima has been discontinued. If you're looking for something new, check out the best cold weather synthetic sleeping bags for 2019.


Price Reviewers Paid: $355.00


The Moonstone Maxima is incredible. It is designed…

Rating: rated 5 of 5 stars
Design: Mummy
Fill: Polarguard 3D with Lite Loft A/C liner
Temperature Rating: -30
Weight: 3 lbs 15 oz
Price Paid: $355

The Moonstone Maxima is incredible. It is designed with extra room in the torso, so you don't feel so constricted when you cinch the top. The A/C liner is removable which makes the bag tolerable in warmer weather; without the liner the bag is rated at either -5 or +10 depending on how much fill you decide to sleep on. Moonstone makesa real quality bag: I sleep in some damn cold weather and that bag has never let me down.

Out for Testing

The Moonstone Maxima is out for testing and review!

Members of Trailspace's Review Corps product-testing program are currently testing the Moonstone Maxima. Stay tuned for reviews of this cold weather synthetic sleeping bag from .

Do you have questions about the Moonstone Maxima?
Send them to and we'll do our best to address them in our upcoming review.