Having spent (for trg purposes) 20 hours in a liferaft in Feb 79 when I got so cold I couldn't p!ss, I can assure the OP that such gloves are a vital safety item. Luckily (!) a storm blew up, so the DS came out to fetch us. One of the boats was swamped as it approached the slip-way, so we had to swim for it.
Only then did we get to lick the road clean, but since it was a survival course, there was no breakfast