Yeah they tell you to wear it off shore, incase you fall in the North Sea, it "keeps you warm and won't absord as much water as denim, so you can swim further and stay aflot"
Yeah ok fair point, but after being in the North Sea for 30 seconds, you get shock from Hypothermia, your hart stops and you drown/die of shock
So i'm not totally sold on the idea, i think wearing a full body life suit might be a better idea - but that's just me personaly