I really love this chair pad . It fits great , looks good , and it's water proof . 
It has straps at the corners and middle of the foot rest . Two straps  that pull thru and anchor the back crease .  And 4 adjustable back straps that are the same color,  not the white elastic bands . These have multiple buttons and button holes,  so you can fit it to your chair .
Our cats left us a present on one of the chairs. It didn't soak through,  and it washed beautifully. 
In my pictures I showed my husband's chair and mine . Even though the pad has arm extensions for both arms , he chose to fold them under. And I only use one and fold the other under my seat. If you use them there's also a flap that goes between the arm and  seat to hold it in place. 
I would definitely recommend this chair  pad.