A smart solution if you have mobility problems with your shoulders. It will slide only if the webbing is held in the right angle, watch the video: https://www.facebook.com/reel/535125705370974

Basically the hard webbing will slide and release only if pulled downward and to the front, otherwise it’s locked

The price is for one piece. And one is enough, once one shoulder is released than it’s easy. Ideal for dry suit on the side where you have the deflation valve!!