The vest has 3 pins on each side for the straps to fit over. One of the pins has come off. Take a look at the phots and make sure the condition works for you

For fans of the classic Action Man TV show, these  Night Ops Deluxe Set accessories are a must-have. This set is the vest and boots, both designed in black ABS plastic to match the character's signature look. This original, licensed reproduction is part of the Action Figure Collection series from Peterkin Asia Ltd.