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Old December 2, 2006, 12:36 AM   #24
moose fat
Senior Member
Join Date: June 20, 2006
Location: Alaska, Yukon R. delta
Posts: 391
AKA; Bunny Boots, Oh My God I've Forgot That Waskaly Wabbits Name

FF, the valves are to equalize the air pressure when going up in an airplane w/out a pressurized cabin. And, the white ones are warmer than the black ones, I have both. The commercial makers' are BATA and MINER. They are heavy, but oh so warm. If they get wet inside, like when you break thru an overflow you just wipe out the inside, change your socks and continue on (as long as the valve is closed).
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