US Navy Sailors - 2016 improved version of the flame-resistant coveralls. What's supposed to be a more comfortable and durable version of the FRV coveralls — which sailors repeatedly griped wore out
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USFF Announces Approval of Improved Flame Resistant Variant (IFRV) Coverall > United States Navy > News Stories
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What uniform is MCPON wearing?': Navy senior enlisted leader shows off flame-resistant khakis | Stars and Stripes
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