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Mountain Hardwear UltraLamina 0°

rated 5.0 of 5 stars
photo: Mountain Hardwear UltraLamina 0° 3-season synthetic sleeping bag

The bag is warm, packable, and good quality. Someone who sleeps cold should do well in this bag.


  • Warm
  • Compressible
  • Light
  • Quality


  • Too hot?
  • Lighter zipper and fabric snags

This is the best sleeping bag I've used so far. Using it recently on the AT it kept me warm @ 20°F and got too hot when I zipped it up the second night @27°F in the tent. I have a feeling it will go down to 0°F, but it works well into the teens.

Have the regular size so there is extra room all over the bag for me to move around in. I probably should have a short, but the extra room allows me to store all kinds of water bottles and clothes in it, plus phone, GPS, etc.

The bag is easy to get into, and the zipper is super smooth. It does tend to catch the light material in the zipper a bit, but it just means you should be careful zipping it up. It zips from the outside or inside of the bag, great lightweight design.

The bag has very good moisture resistant property. It does get wet, but it dries well because of the light fabric. FYI I bought it for a cave expedition in a 37-40°F alpine cave for camp purposes. The trip was in and out of the water for 8 hours just to get to camp. Extended surveying and rigging took place on trips from this camp. Very difficult to keep things dry. The bag did its job better than the other bags on the expedition.

The bag really packs down well for synthetic. Love how it packs down. Plus, the bag seems to puff up well again even after the couple years I've had it.

It's pretty durable, as I remember it was washed in the cave stream after the expedition. Just don't be forcing the zipper through fabric snags and it will be fine. Also, store the bag hanging up so it can loft. Only leave it stuffed when you have to.

Source: bought it used
Price Paid: $150

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short regular long
Price MSRP: $220.00
Historic Range: $133.95-$295.00
Reviewers Paid: $150.00
fall 2010
short regular long
Weight 2 lb 14 oz / 1310 g 3 lb 5 oz / 1510 g 3 lb 13 oz / 1720 g
Fill weight 2 lb 2 oz / 970 g 2 lb 9 oz / 1150 g 3 lb 0 oz / 1360 g
Loft 6 in / 17 cm 6 in / 17 cm 6 in / 17 cm
Temperature rating 0 F / -18 C 0 F / -18 C 0 F / -18 C
EN comfort 27 F / -3 C 27 F / -3 C 27 F / -3 C
EN lower limit 14 F / -10 C 14 F / -10 C 14 F / -10 C
Fill Thermic Micro synthetic Thermic Micro synthetic Thermic Micro synthetic
Shape Mummy Mummy Mummy
Max user height 5 ft 6 in / 168 cm 6 ft 0 in / 182 cm 6 ft 6 in / 198 cm
Shoulder girth 58 in / 147 cm 60 in / 152 cm 62 in / 157 cm
Hip girth 55 in / 140 cm 56 in / 142 cm 58 in / 147 cm
Foot girth 37 in / 94 cm 38 in / 97 cm 40 in / 102 cm
Price $220.00 USD $230.00 USD $240.00 USD
Product Details from Mountain Hardwear »