The strap is actually on the rear right hand pocket and was intented as a means to carry a two-way radio. Some manufacturers place a spring loaded clip on the radio. The strap allows the radio to fit into the pocket yet still be accessible as the clip goes over the strap. Other uses are to hold handcuffs or hook your hearing protectors on to while at the gun range. You won't lose your "ears" while you bend down and pick up brass, but you will look pretty silly with them hanging off your @55. Hope this helps.