The Metolius Easy Aider uses a unique adjustment system to help you size it precisely for aiding a pitch or jugging behind your partner. The foot loops can be tightened to your shoes with a simple nylon strap, so you don't have to worry about your feet popping out over and over while you're cleaning 200 feet of pins. Metolius used a wide foot loop to provide extra comfort--something you'll really appreciate after five days on a grade VI nail-up.