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Read the Review
Read the Review
Read the Review
Read the Review
Awards Editors' Choice Award Best Buy Award Top Pick Award   
Price $184.93 at REI
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$140 ListCheck Price at Amazon
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$19.97 at Amazon$265.00 at Amazon
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Overall Score Sort Icon
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82
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76
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74
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73
Star Rating
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Pros Durable, lots of head room, completely weatherproof.Lightweight, versatile, stows easilyLight, durable, warmWeight, packed sizeSimple, lightweight, weather-resistance
Cons Heavy, bulky.Leaky zippersNot waterproof, tight fit for 5'11"+ individualsDurability, no zipper/cinchExpensive, fiddly velcro closure
Bottom Line The OR Alpine sets the standard for what an alpine bivy should be.Sierra Designs found what could be the perfect weight, comfort and versatility ratio in a bivy sack.The Escape is an excellent lightweight choice for cold dry climates or emergency situations.The TACT is an ultra lightweight reusable emergency bivy best suited for very occasional use.If storm protection is your sole need from a bivy sack, the Alpine is a strong contender.
Rating Categories Alpine Bivy Backcountry Bivy SOL Escape Bivvy TACT Bivvy Rab Alpine Bivi
Weather Resistance (25%)
10
0
10
10
0
8
10
0
7
10
0
6
10
0
8
Ventilation (15%)
10
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9
10
0
8
10
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7
10
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6
10
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7
Comfort (20%)
10
0
10
10
0
9
10
0
6
10
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5
10
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7
Weight (25%)
10
0
6
10
0
8
10
0
9
10
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10
10
0
7
Packed Size (15%)
10
0
6
10
0
8
10
0
9
10
0
10
10
0
7
Specs Alpine Bivy Backcountry Bivy SOL Escape Bivvy TACT Bivvy Rab Alpine Bivi
Measured Weight (oz.) 28.5 13.6 8.36 4.55 16.23
Packed Size (in.) 4" x 15.5" 3" x 9.5" 4" x 7.5" 2" x 4.5" 4" x 10"
Waterproof? Yes Yes Water-resistant fabric with waterproof seams Yes Yes
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