These would be optional equipment on any variety of pick-up trucks and Catepillar Tractors, all the way up to the mega-large above ground strip-mining and underground lead mining equipment. This would be excellent for workers primarily in cold, wet environments where nothing stays dry..AND EVERTHING IS COLD. Road and contruciton crews would love these. A person has two pairs of boots and gloves. One he wears to work dry the other dry pair he puts on the low noise, fan driven, low energy,...