I already made a previous post (sitting in moderation) about wood or hard rubber doesn't really matter.
ha ha, I'll play along...
yes, vaguely familiar with horses.
Yeah, a horse very unnecessary bourgeois first-world luxury thing to have these days....even if you have some kind of purposeless psuedo-ranch where you play cowboy with your spare time. So no, I don't have gobs of experience with horses. But yeah, rubber strong enough to withstand a horses hoof/shoe, strong enough to deadlift from. Got it.
. . . SO HERE'S SOME ACTUAL LIFTING INFORMATION PEOPLE COULD USE:
I'll add, don't get your horse TRAILER mat mixed up with horse STALL mat material.
Some horse STALL mats are in fact a little soft and squishy.
Some might be even textured a bit.
And/or are dimpled underneath to allow moisture to move around.
Don't get/order those.
I was at Tractor Supply the other day, what ever they had that day was in fact squishy,
made of what can best be described as crumb rubber .... seemed no bueno.
You might want to see what you getting in person, rather than the current trend of ordering everything online.