Mines not from Armageddon Gear but it is essentially the exact same thing. Works great and you can either loop it around like in the Armageddon Gear picture or connect one end to you and the other to the gear making it extra long.
Bungee will allow you to stretch it into position or extend it further than it sits in its natural state. Paracord would allow the pump pillow to stay with you but may get slightly in the way by being longer than needed most of the time.
That is a good price, how does it hold up? Seen a bunch of people with landyards at the last few matches where it appears they where all stretched out and dragging around on the ground.
I use the Bandolier from Wiebad. It allows me to sling my Pump Pillow over a shoulder or cross body. I don't have to 'hold' the bag in place. When not in use, I just push it around my back.