Amazon.com: IncStores 1/4" Thick Tough Rubber Flooring Roll | Flexible Recycled Rubber Floor Mats | Heavy Duty Rubber Mat for Home Gyms, Sheds, Horse Stall Mat or Trailer | 4'x10' | Blue :
4' X 6' X 3/4" Thick Rubber Horse Stall Mat | Schneiders
Interlocking Portable Horse Stall Mats 3/4 Inch x 2x2 Ft.