I BOUGHT 4 CHAIRS, I FOUND THEM VERY USEFUL AND HELPFUL, I GAVE TWO TO MY DAUGHTER FOR MY GRANDCHILDREN TO USE AND I KEPT THE OTHER TWO AT MY HOUSE TO USE THEM WHEN THEY VISIT US.  I JUST LOVE THEM, THEY ARE DONE OF A VERY HARD PLASTIC AND THE STRUCTURE IS VERY STRONG, I HAVE EVEN SEAT ON IT (145 POUNDS)