If you take the press vest from a dead player, the vest will appear on you but also remain on the dead player. If another player tries to put the vest on him ( the one from the dead player ) he will get the vest from the first player.
Ex:
Starting point:
Dead player: press vest
Player one: no vest
Player two: no vest
Step1:
Player One -> take vest from dead player
result in:
Dead Player -> vest still on
Player one: -> press vest on
Step2:
Player Two -> take vest from dead player
result in:
Dead Player -> vest still on
Player two: -> press vest on
Player one: -> no press vest.