The DC motor cops used lap robes in the 50s, 60s and 70s. Made of sheepskin, they were warm, but soaked up water in the rain. I made one using clipped sheepskins and naugahide that was liter and it did a better job of keeping me both warm and dry as the water tended to roll off. Working as a courier, going in and out of buildings (cold to hot continuously) the lap robe beat heavy pants or leggings.
"For those who fight for it life has a flavor the protected never know."
USMC 65-68 RVN 66-67