This is an innovative strap system for the NS design basses. Using this you get to wear the bass rather than stand by it, and get all the freedom of a bass guitar on a strap but still keeping something approaching the playing position of an upright bass. The strap lets you rotate the bass to the best angle to suit your playing. It's important of course not to position the bass too vertical or you will look like some sort of Ancient Greek fertility figure, although this may suit some players.