Open main menu

Mountain Hardwear 1st Dimension 30°

rated 4.5 of 5 stars

The 1st Dimension 30° has been discontinued. If you're looking for something new, check out the best 3-season synthetic sleeping bags for 2024.

photo: Mountain Hardwear 1st Dimension 30° 3-season synthetic sleeping bag

Great, lightweight bag when you're sure the temperature won't dip much below freezing. I didn't have the same experience with the temp. rating as other reviewers, though. I'm usually a bit of a cold sleeper and I'm comfortable in this bag without any clothing down to about 40. At 30 I've got to wear a layer of fleece and a hat, but for many bags I've got to do that at 10 degrees above the rated temp. I've got a newer version -- 2003 or 4 with Polarguard Delta -- so maybe the newer bag is a bit warmer. In any case, for those who want a quality lightweight synthetic bag, this is a fantastic deal.

Design: mummy
Fill: Polarguard Delta
Temperature Rating: 30 F
Weight: a little over a kilo
Price Paid: $110

This is a great warm weather bag. It weighs next to nothing and stuffs very small. The "crazy legs" feature is a great addition, giving your legs a little more room. It has a nice warm hood, and a comfortable lining. The temprature rating of 3O degrees F is a little optimistic in my opinion. I have slept in it very comfortably when the temprature was in the low 40's however. Also, I would have expected zipper pulls on both the inside and outside of the zipper on a bag of this quality. Otherwise, this is a great bag.

Design: Mummy
Fill: Polarguard 3D
Temperature Rating: 30 F
Weight: 2.5 lbs
Price Paid: $175

Best investment I ever made.

Actually I bought the bag because of the unreal price, but little did I know that it'd be the bag I use the most. It stuffs smaller than the tiny stuffsack MH gives you, and is relatively weightless compared to my colder weather bags.

It does get kind of chilly when the temps dip into the 30s. However I only thought it'd get down in to the 40s and was caught off guard and in need of a warmer bag...and gloves.

Can't say enough about's my favorite.

Design: Mummy
Fill: Polarguard 3D
Temperature Rating: 30F
Weight: 2.5
Price Paid: $80

While the quality of the bag is fine, I must say that even the men's long version is not for you if you wear a coat larger than a 42 or 44. I have had to purchase two of the bag expander tubes and I wear a size 48 coat. This has caused a $165 bag to suddenly become a $275 bag. If you have a large chest size, this bag isn't for you.

Design: mummy
Fill: polarguard
Price Paid: $165

Much like Mark's experience, I found the bag very comfortable, but overrated in the temperature department. I just came back from a two-nighter, slightly chilly at 40 degrees and sleeping in long johns top the next night at 36 degrees. Otherwise, a very nice bag!

Design: Mummy
Fill: Polarguard 3D
Temperature Rating: 30 F
Weight: 2.5 LBs
Price Paid: paid $155

Your Review

You May Like


(no Gender)
Price Reviewers Paid: $80.00-$155.00
Price Historic Range: $63.97-$165.00
Reviewers Paid: $165.00-$175.00
Price Historic Range: $79.93-$155.00

Recently on Trailspace

Big Agnes Fly Creek UL2 Review

Fire Maple Petrel Ultralight Pot Review