It is very important that you inflate your fenders to 2PSI
If you under-inflate them they will not perform correctly and may not protect your boat as they should.
If you over-inflate them you the sides will bow out, distorting the fender, causing all the abrasion to be in one place
and for the fender not to absorb the impact but to cause you to bounce off the pontoon, wall or another boat.
Over-inflating your fender will void the warranty.
Inflating to 2PSI will allow you to depress the walls with your thumb by about 1/2 centimeter with only light pressure.