Black Diamond Big Wall Bivy
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- Big-wall-specific design incorporates a strong waterproof tie-in point
- Sewn-in flexible wire creates air space
- Dual-sided zipper and mesh covered opening
- RF welded tie-in point for secure anchoring
- ToddTex single-wall fabric and Taped seams
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DECENT FEATURES of the Black Diamond Big Wall Bivy Sewn-in flexible wire creates air space Dual-sided zipper and mesh covered opening RF welded tie-in point for secure anchoring ToddTex single-wall fabric Taped seams The SPECS Type: Long Season: 4 Average Packaged Weight: 2 lbs 2 oz / 950 kg Dimension: (L X W1 X W2 X H): 99 x 35" / 251 x 89 cm Area: 24 square feet / 2.2 square meter Weight: 1 lb 14 oz / 840 g Packed Size: 6 x 13" / 15 x 33 cm
Size: LONG | Color: YELLOW
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I use this for minimalist hiking/camping and for weekend motorcycle adventures when I don't want to deal with a full size tent. I purchased the long model and would recommend the same decision for anyone over 5 feet. The extra length is really nice for stuffing boots, jackets or small bags to the bottom to keep them dry.
A footprint or tarp are good ideas in dewey, damp, or raining conditions but not necessary most of the time. No foot vent so typical (poor) overall ventilation means you can end up with condensation in the morning - this is not a reason to take off stars, it's the price of using a bivy.
The only caution:
The photos show the this bivy standing tall - it's filled head to toe with something for photos. It is not like the Outdoor Research Advanced bivy (an excellent alternative but heavier and bulkier), though it does have a light cable that will help keep the material somewhat lofted over your face. I wear a men's 48 jacket and I just fit comfortably inside with a Mountain Hardwear Lamina 35 and thin sleeping pad. My self inflating Thermarest is not compatible if I want to fit. The width of this bivy does not include it being filled.
IMHO, cons are:
- For larger folks (I'm 6'1", 200lbs, no "excess" fat, no particularly broad shoulders) it is a 3-season bivy - because, whilst roomy enough to place a winter sleeping bag, in the chest-shoulders area the bag is compressed against the bivy walls - resulting in "cold spots" and loosing of heat; the opening is too tight to, weather permitting, let you comfortably lay with upper body (with the winter-sleeping-bag or parka on) outside the bivy;
- The fabric loses breathability when wet.
This bivy sack is phenomenal. light, dry. Just Used it first time in snow at around 3,500 ft, temps in the teens. Some very light condensation inside on awakening but otherwise very dry and does add warmth. Im 5'8 and got the normal length and have plenty of room in the bottom for boots and other necessary gear and although it is somewhat snug I could still move around when needed. Tie in point looks bomber but didn't need it. Overall impressed!!!
Very light weight: 1 lb 10 oz for the normal length.
The seams do need to be sealed and you have to do this yourself. Black Diamond doesn't do that for their products.
Freestanding single-wall bivy design saves weight by eliminating the need for a tent canopy, fly, and poles;
Waterproof breathable Todd-Tex fabric sheds wet weather and breathes exceptionally well.
Optional footprint sold separately which I did purchase. I like to take really good care of my gear.