How to Choose Sleeping Bags for Backpacking
Mountain Hardwear Lamina Z Spark Sleeping Bag
This product is not available.
A great choice for 3-season backpacking, this roomy synthetic sleeping bag is lightweight and compressible, with thermally zoned insulation to put extra warmth around your core and feet.
Shop similar productsKey Details
Fill
Thermal.Q synthetic fibers
Temperature Rating (F)
34 degrees (F)
- Unique welded construction reduces weight and bulk, maximizes insulation loft, eliminates cold spots and thermally maps insulation to areas where warmth is needed most
- Thermal.Q insulation has outstanding compressibility, maintains excellent loft and continues to insulate even when damp
- Comfort mummy cut maximizes warmth and fit while minimizing weight
- Ergonomic draft collar and tailored hood with face gasket comfortably block drafts and seal in warmth
- Comfort footbox follows natural foot position for maximum warmth and comfort
- Soft polyester lining wicks away moisture and lightweight nylon shell has a durable water repellent finish to ward off moisture
- Full-length #5 zipper with double sliders for versatile ventilation
- Zippered pocket at shoulder
- Nylon compression stuff sack and mesh storage bag included
- 34³F EN (European Norm) lower-limit rating is suitable for 3-season use
Imported.
Temperature ratings are intended as a guideline to help you compare products, rather than a guarantee of warmth, since many different factors contribute to your comfort while you sleep. Backpacking bags are typically rated for temperature according to an independent testing protocol—currently International Organization for Standardization (ISO) 23537, though some older items followed European Norm (EN) 13537. Testing is based on a person wearing one base layer and a pair of socks, sleeping on an insulated surface with a minimum R-value of 5.38.
Each bag then gets 2 ratings: the Comfort rating is the lowest temperature at which the bag will keep the average "cold sleeper" comfortable, and the Lower Limit rating is the lowest temperature at which the bag will keep the average "warm sleeper" comfortable. Some brands determine their own temperature rating by aligning to the Comfort rating for women’s bags, to the Lower Limit rating for men’s bags, or somewhere in the middle for nongendered bags.
View all Mountain Hardwear Backpacking Sleeping BagsEach bag then gets 2 ratings: the Comfort rating is the lowest temperature at which the bag will keep the average "cold sleeper" comfortable, and the Lower Limit rating is the lowest temperature at which the bag will keep the average "warm sleeper" comfortable. Some brands determine their own temperature rating by aligning to the Comfort rating for women’s bags, to the Lower Limit rating for men’s bags, or somewhere in the middle for nongendered bags.
| Best Use | Backpacking |
|---|---|
| Tested Lower Limit | 34 degrees (F) - EN |
| Tested Comfort | 42 degrees (F) - EN |
| Temperature Rating (F) | 34 degrees (F) |
| Temperature Rating (C) | 1 degrees (C) |
| Shell | 30-denier ripstop nylon |
| Zipper Location | Left |
| Insulation Type | Synthetic |
| Fill | Thermal.Q synthetic fibers |
| Fill Weight | 1 lb. 4 oz. |
| Lining | 40-denier polyester taffeta |
| Sleeping Bag Shape | Mummy |
| Stuff Sack Size | 6 x 12 inches |
| Gender | Unisex |
Buying Advice
Review this Product
Adding a review will require a valid email for verification
Sonkrates
Pennsylvania, United States
True to specs, great warmth for weight
8 years ago
Brought this bag for backpacking in Rocky Mountain National Park, extremely happy with my purchase! Slept warm and sound in a t-shirt and shorts at 11,050 ft on an UNinsulated sleeping pad. I am 6'1, bought the long bag and found the torso and foot box both very roomy. This is my first mummy bag as I am a stomach/side sleeper and I had no issues moving around inside the bag or getting it to roll with me. The second zipper at the bag's bottom is nice if you get warm and want to pop a leg out.
Yes , I recommend this product
DFL0321
Salt Lake City, UT, United States
Worth every penny
9 years ago
Bought this bag on a whim. My buddy and I were on a camping/road trip from southern CA in May. We had originally planned to go to Zion and Escelante in Southern Utah. During the trip he changed his mind and wanted to go backpacking into the mountains, so we decided to head to the High Uintas, Ut. I only packed for warmer temperatures so we stopped at REI in Salt Lake City so I could get a few things. Being a unplanned expense I wanted a bag I could take into the high mountains and colder temperatures without breaking the bank. I did a little research on bags and found this one to be the best bang for the buck! I was so happy and pleased with the purchase. We had planned to stay in the mountains for 3 days/nights but after 2 my friend had enough because he was freezing with his 45 degree bag. The temperature dropped into the low 30's upper 20's on us with rain and snow while we were out. The bag preformed beyond my expectations and I was comfortable and slept well despite the freezing conditions we found ourselves in. Later on the trip we planned to cut over through Nevada and hit the eastern Sierra's and Sequoia Nat Park. He made an emergency stop at REI and bought the same bag for the same reasons. Again the temps were low 30's and we were both extremely pleased with the bags performance. It packs up small, and does a phenomenal job at repealing moister, and cold. I look forward to many trips and years of use out of this bag!!
Yes , I recommend this product
Archie Begg
Los Angeles, CA, United States
Could have slept in the nude...
8 years ago
Picked this up last week and took it up to Kings Canyon. At 10,000 ft, the temps dropped to the mid 30's at night, but this sucker kept me warm and fuzzy. Best part - packs really small into included compression sack, so no more grumpily shoving a bulky sleeping bag into my pack. Only thing i'd improve is the zipper, darn thing gets stuck if you don't zip it just right, but hey, its better than freezing. Excellent bag for the price.
Yes , I recommend this product
kootenay
Lafayette CA
First Impressions
10 years ago
Nice well made bag. Nice footbox and hood, reasonably roomy mummy. I am 6' 185 lbs. and could just get into the regular. The long was more comfortable and spacious for me, I opted for the extra two oz. My long weighs 2lb 5oz, 2 oz more than the specs show, no biggie. Without much effort it goes to 7x11 inches in the provided compression sack. Overall 2lb 8oz, a nysilk stuff sack would cut that 2oz. Comes with a nice storage sack too. The big question will be how it performs around 32F, 0C. I haven't used it yet in that condition. The Z Flame may be an equally good choice, but about 11oz more and more bulk. I wanted a bag for summer, but probably am pushing it a bit for the high Sierras, where getting to freezing at night does happen in July and Aug. But I saw a few reviews that were favorable for performance at 30F.
Yes , I recommend this product
woodmaus
Nashville, TN, United States
Initial Impressions - Long size
10 years ago
I just picked up the Spark at a great price during the Anniversary Sale (it pays to be a Member!) and though I haven't used it in the field I have a few initial impressions that might be helpful for any potential buyers of the Spark. I will be base camping in the rockies in a week, so I will update on its performance later. It does have a nice fluffy loft to it, so I feel confident that it will perform well close to its 34F lower limit rating. I own a down bag that is lighter and warmer than the spark, but after reading the specs and a couple field reviews on the Lamina, decided it wouldn't be a bad a idea to have a bag that would work well in slightly warmer weather, didn't have to fuss too much about getting wet, and otherwise handle with kid gloves. A rough-and-tumble bag, if you will. The weight and compressed size listed in the specs are what initially caught my attention. Sadly, either MHW seems to have fudged their numbers a bit, or there is just a wide margin of variance in the manufacturing process. The long size, which I purchased, is supposed to weight in at 2 lbs 3oz, and pack down to 6" x 12" in the compression sack. The included compression sack has a little tag that states that it is a 7" x 12", but even when I have it packed in there good, it is still a bit bulkier than advertised at about 8" x 13." I realize that the weight specs for sleeping bags generally do not account for the compression sack, but on my digital scale, the whole kit-n-kaboodle weighs in at 40.65 oz, or almost 2 lbs, 9 oz. The compression sack itself only weighs 2.25 oz, so conservatively, the Spark weighs a good 3 oz more than advertised. Not a big deal for me, however as I plan to keep the bag regardless. Ounce-counters should consider themselves forewarned. For a synthetic with temp specs, its size and weight are satisfactory, but there might be others pickier than me.
Yes , I recommend this product
Cb-5
Utah
Great bag for backpacking.
9 years ago
I have used this bag in the summer and in fall nights as cold as 18degree, which was a little cold for this bag. My favorite feature of this bag is its size and weight. It packs very small and is light.
Wallythe Evangelist
Seattle, WA, United States
An excellent, lightweight sleeping bag!
8 years ago
I bought this for my son for backpack camping. He loves it! It is just right for cold or warm camping.
Yes , I recommend this product
Coletta
Great compact synthetic bag!
9 years ago
This is a great synthetic bag for backpacking! Very compact and warm. I felt very comfortable in very low temperatures (~30*F). This is a mummy bag, though, so if you need some wiggle room, it may not be the best for you.
Living by the 12
Tomball, TX, United States
Great bag for large frame guy
8 years ago
Been looking for a quality bag that fits big shoulders. This bag has plenty of room to move and sleep comfortably. Packs down small and is very light for backpacking.
Yes , I recommend this product
Jay2010
Pittsburgh PA
Great sleeping bag
8 years ago
I bought this bag for an 8 day hiking trip in western PA. The first 2 nights had lows of 26 degrees. On those nights I used a bag liner and was conftorable. The rest to the trip we had sleeping temps between 45-34. I was conftorable sleeping without the liner. I'm 5' 10" and the regular fits me fine. I also have the lamina flame z. I love the mountain hardware sleeping bags. They are good quality at an affordable price.
Yes , I recommend this product
1 - 10 of 23 Reviews