This is the standard Bivi Bag (Bivouac) that will fit the smallest to the largest Wiggy's sleeping bags & sleeping bag systems. Regardless of common belief, Bivi Bags DO NOT add to the temperature ratings of sleeping bags. The job of the Bivi Bag is to protect the user from rain, snow and wind when a tent is out of the question. Understand that ALL Bivi Bags will collect moisture on the inside.
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