Spa - Hot Tub Water Brick Booster Seat -Blue

Does the job. Just need to make sure that you use clean stones to weigh it down. I soaked mine in Chlorox before inserting into the pillow.

I was disappointed in the pillow it went almost flat when even a 150 pound person sat on it. Had to return it and go back to the drawing board.

Buy Spa - Hot Tub Water Brick Booster Seat -Blue Now