I think you mean horse stall mats, which you can find at Tractor Supply, etc. 4’ x 6’ x 3/4” vulcanized rubber: https://www.tractorsupply.com/tsc/product/4-ft-

I think you mean horse stall mats, which you can find at Tractor Supply, etc. 4’ x 6’ x 3/4” vulcanized rubber: https://www.tractorsupply.com/tsc/product/4-ft-x-6-ft-x-3-4-in-thick-rubber-stall-mat https://www.tractorsupply.com/tsc/product/4-ft-x-6-ft-x-3-4-... The ones I have (I used a few in my home gym) were made in Canada. I’m surprised any of these come from China.