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Moonstone Optima

rated 4.5 of 5 stars

Moonstone is no longer in business, and the Optima has been discontinued. If you're looking for something new, check out the best 3-season synthetic sleeping bags for 2023.

I was cold at Camp Verde, AZ, campground in February and the zipper snagged the nylon backing. Good for spring camping in dry weather at Havasupai Falls Campground with no tent.


  • It is warm and compacts nicely.
  • Light weight


  • Zipper snagged and couldn't geit it loose with fingers.

I decided to take advantage of a late winter snow fall one February and skied at the Flagstaff Sno-bowl. I drove to a Camp Verde camp ground that night and would sleep in the back of my S.U.V. I found myself so cold that I was starting the engine frequently to heat up the truck.

At some point the zipper snagged the backing material and it was so severe I ended up having to use a needle nose plier I found in my tool kit about an hour later. I did enjoy fresh powder the next afternoon back at Sno-bowl.

I have used this bag in the early spring and late fall and it works great here in Arizona in the 1,000-4,000 foot altitude range without a tent. Never used it in wet conditions or with a tent so I don't know about that. It seems to wash easy, compacts into the stuff bag easy. It is synthetic so no allergy issues.

Source: bought it new
Price Paid: $195

Version reviewed: Long

I stumbled onto the Moonstone brand at a "high-end" outfitter in 1990 in Boston, Mass. I have the Optima Long and Maxima Long bags, with snap-in liner. The latter is used mostly in New England winters; the former in spring and fall cool weather.

My Optima is showing its age with a couple rips on the zipper baffle this fall. Hardly a cold night in either bag.


  • Extra long length with room
  • Washes (by hand) well


  • Expensive but WORTH THE PRICE

Too bad to hear, now years later, about the closure of Moonstone.  I have been convinced more than once about the value of synthetic bags vs. down. The Moonstone bags store well loosely rolled up in storage bag and loft well.

I was sold, TWICE, on the one-piece, full length construction of these bags versus the traditional baffle construction. I made the right purchases at the right time YEARS AGO..  RIP....

Source: bought it new
Price Paid: $200-250, maybe more...

This bag kept me warm for a month in Wyoming this summer. It is a great 3-season bag, and, with the 25 degree snap-in liner, it can be a great 4-season bag. I was only cold on one night, when the wind was howling at 40 mph and I was sleeping outside at 11,000 ft.

It kept me warm, in the rain (there were 15 days of rain) and the bag was a godsend.

Design: Mummy
Fill: Polarguard 3D
Temperature Rating: 15 F
Weight: 3 lb 2 oz
Price Paid: $165 ($230 reg.)

A great bag for the three-season backpacker. An optional snap-in liner adds 25 degrees to the rating ($70). Take a serious look at this one.

Design: Mummy
Fill: Polarguard 3D
Temperature Rating: 15-30 F
Weight: 3lbs 3oz (long)
Price Paid: $199.99

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Price Reviewers Paid: $165.00-$200.00

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