Great quality and easy to lace (with it's eyelets and D-ring). It includes a inflation pipe with a quick deflation valve for quick and simple use.
These bags are supplied individually making it easy to repalce individual bags.
You simply need to half inflate the air bag by blowing into the valve to and then turning it to close it shut. Push the airbag into the position you would like it to be in and then continue inflating in position until it is fully inflated, this should help it remain secure and in place. Where possible also tie it into your boat to ensure that if you go for a swim you do not loose your air bags.