This method is intended for the chest and shoulders. For the knee armor, I used Velcro sewn to the knee area on the flightsuit and attached to the backside of the knee armor. This in combination with the elastic straps keeps them on securely.I know this is an older pinned post and I plan to do this pin method when my armor and vest come in. But I'm having a hard time picturing the knee connection described here. Any chance you could post a pic or two?