Actually, I have found me the stress ball only for the strenuous testing times, but now he will perk kneaded used to play or sometimes thrown around the room - simply because it is so much fun. I use it actually much more often from good as from a bad mood out what the product does not detract from but itself. The material is really impeccable. The ball has a rather firm structure, but can squeeze easily and is immediately perfectly round. He shows no traces of holes, cracks or color loss. I am more than satisfied!