A favorite insulated boot cover choice for use on Denali, Himalayas, and Polar expeditions. Patterned to fit double plastic mountaineering boots. It is a very unique overboot in that it can stretch to fit easily over a wide range of double shelled mountain boot models, and the large volume “combi-boots” such as those from Millet, La Sportiva, etc.
The Forty Below® Purple Haze™ model uses a special nylon covered, 4.7 mm stretchy neoprene closed cell foam insulation, with 2 layers of heat reflecting Titanium, which goes completely around and under the boot, with no gaps in the insulation. The insulation panels are glued together, and also stitched on the inside and outside surface, with no sewn through seams. They fit trim to the boot, and are not bulky. They fit with a wide range of crampon binding styles such as “step-in”, “new-matic”, and “strap-on” crampon bindings, as well as wire toe ski mountaineering bindings.
The toe and heel area have small triangular shape panels made of a slightly thinner neoprene insulation that allows for many wire toe bails and flip lever heels to simply compress the insulation and rest on the toe and heel groove of the boot. The toe, heel, and lower side area of the overboots have a thin rubber paint applied to add abrasion resistance and help protect the stitching. The closure is in the front using a large size YKK® HEAVY DUTY zipper, with a flap underneath to help keep snow out.
This chart shows the overboot size as it compares to the sole length of the boot it will actually cover:
|Size||Boot Sole Length|
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