Guys, anything that is 40 mil is very think. Think about this - a normal swimming pool liner is only 20 mils. You can get 27 mils but it costs more for installation and the product. Most pool builders won't put in anything over 27 mil because it is too hard to get it to bend into shape. So this 40 mil stuff must be tough!

(I work summers for my cousins who own a pool store.)

Thanks so much! This is great. I teach at our school - after school - and haven't been able to teach tap because of the floors. I will check into this closer. :0) I just love you guys!