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Read the Review
Read the Review
Read the Review
ZPacks 20 Degree
Read the Review
Awards Top Pick Award Editors' Choice Award Best Buy Award Editors' Choice Award  
Price $319.00 at Amazon$364.00 at Feathered Friends$300 List$410.00 at Backcountry
Compare at 2 sellers
$379 List
Overall Score Sort Icon
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70
Star Rating
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Pros Truly ultralight, packs down well, good zipperHighest scoring ultralight sleeping bag, best features, and most versatileVery affordable, highly customizable, versatile, lots of featuresWarmth-to-weight ratio, excellent fabric, best bag with a hood, versatileWarm for an ultralight bag, simple and versatile design, box baffle construction, waterproof stuff sack
Cons Not very warm, tight around shouldersNot as warm as others (in the version we tested), neck draw cords loosen over timeLong wait for product to be custom made and shipped, foot box draw cord still leaves a little hole, lots of buttons and strapsTight fit, shallow hood, expensiveA little constricting, small foot box, not the best neck draw cord design
Bottom Line If weight and space savings are paramount, the Spark is the tool for the jobThe best performing set of features that allow for the most versatile usageThe warmest quilt in our review also comes at a reasonable priceA very warm and lightweight full mummy with a full zipWith an enclosed foot box and ¾ length zipper, this warm hoodless mummy can also be used quilt style
Rating Categories Sea to Summit Spark SpI 40 Flicker 40 UL Revelation 20 Summerlite ZPacks Classic
Warmth (30%)
4
6
8
8
8
Weight (25%)
10
6
6
6
6
Comfort (20%)
6
7
6
6
6
Versatility (15%)
6
10
8
8
9
Features (10%)
6
10
8
7
5
Specs Sea to Summit... Flicker 40 UL Revelation 20 Summerlite ZPacks Classic
Style Hooded mummy Center zip mummy bag or unzipper to be quilt Quilt Hooded mummy Hoodless mummy
Manufacturer Stated Temperature Rating 40F 40F 20F 32F 20F
Measured weight, bag only (ounces) 12.4 oz 19.1 oz 20.9 oz 19 oz 20.3 oz
Claimed weight from manufacturer (ounces) 12 oz 20 oz 20.19 oz 19 oz 19.8 oz
Stuff Sack Weight (ounces) 1 oz 0.8 oz 0.6 oz 1 oz 0.9 oz
Stuffed Size 4" x 7" 7" x 10" 7" x 12" 6" x 12" 6" x 12"
Fill Weight 6.3 oz 8.4 oz 13 oz 10 oz 13.1 oz
Fill Power 850+ goose down 950+ goose down 850 Downtek 850+ goose down 900 fill
Construction Sewn through baffles Continuous baffles U shaped baffled quilt Continuous baffle Vertical upper baffles and horizontal lower baffles, box baffle construction
Shell Material 70D nylon Pertex Endurance UL 10D nylon fabric 100% nylon ripstop .70 oz/sqyd (23.7 g/m2) Ventum Ripstop Nylon w/ DWR
Shoulder Girth (inches) 59" 62" 55" 59" 61"
Hip Girth (inches) 51" 48" 55" 51" 61"
Foot Girth (inches) 35" 39" 55" 38" 35"
Zipper Length 1/2 length Full length center zip 1/3 length at bottom Full length 3/4 length
Sizes Regular, long Regular, long, and wide Short/regular, regular/regular, regular/wide/ long/wide 5'6", 6', and 6'6" Slim, standard, and broad (girth) short, medium, long, x-long and xx-long (length)
Temp Options (degrees Fahrenheit) 5, 18, 28, 40F 20, 30, 40F 10, 20, 30, 40F 32F 10, 20, 30, 40F
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