We take a closer look at the 3F UL Gear Tyvek Bivy while also comparing it to the SOL Escape Bivy. We go over its features and try it out with both the Kelty mummy style and Nemo Forte spoon style sleeping bags. With the Tyvek Bivy weighing just 7oz, it makes for good addition when backpacking. Especially comes in handy if extra sleeping bag protection is needed, whether in shelters or camping fast fly style.
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