$60.99 Safe Interlocking Economy 1/2-inch Foam Mat for Kids and Home Gym | Foam mats, Foam flooring 
Amazon.com : Guardian Rubber Floor Mat (4-Feet x 6-Feet x 1/2-Inch, Black) : Exercise Mats 
Greatmats Specialty Flooring, Mats and Tiles: Top 10 Customer Uses for Foam Mats Economy 1/2 Inch
