Has anybody tried one of these?

It seems to be marketed towards kitesurfing but I was wondering how suitable it would be for windsurfing.

Basically I am looking for it to stop the sliding style spreader bars from moving from side to side on the webbing and to reduce the amount it pulls upwards towards your chest.

Any help would be appreciated.

Arlo

Doesn't stop the slide from left to right at all. Dont get it if you are expecting it to stop the slide.

Provides some padding and that is it.