Outslayer 1"x 40" x 40" Puzzle Mat

* These mats provide a comfortable layer of padding and excellent traction* Cover the entire floor or just a portion of it* Mats interlock with each other like a jigsaw puzzle for easy set-up* It come in 2 color combinations, Black/Grey (one side is Black, and the other side is Grey), or Red/Blue (one side is Red, and the other side is Blue) Please make a note in the note section when checking out, about the color/s.* 1" thick 40"x40".* Here is an easy way to figure out how many mats you need: Divide the number of total square feet to be covered by 11.09. The result will be the number of mats you need**FREE SHIPPING IN THE US, EXCLUDING ALASKA, HAWAII.