Depends on what the material is madeof. Any paper type products generally pass through the GItract without a problem, however, any materials containing nylon can bevery dangerous.
I do believe RaspberrySwirl bought natural seagrassflooringat the Home Depot. I believe she saidit comes like carpet does and you can cut it down to the size you need.
I imagine it's not all that expensive and it's safe to eat.