In reply to CharlieMack:
I used to run a posey gear shop. I once got asked for a gilet. As we didn't sell them, I made the same point as the OP, and suggested an alternative with sleeves. The customer said that she was a vet and needed to stay warm at night in cow sheds but needed to keep her arms bare for ...erm... examining the cows. For a long time afterwards, whenever I saw a gilet the thought that sprung to find was 'bullsh*t'!