Review on 🎾 Tourna Pressureless Tennis Balls - 60 Count (Pack of 1): Efficient and Durable Tennis Balls for Extended Play by Vinay Mickel

I bought these for my ball machine. They lasted almost 2 months normally, about 5 days a week with 2 hours of training. But after about 2 months the felt from many balls started to come off leaving bare patches on the ball. Many of the balls inside also had to fall off a bit and were rattling. As if they had a rock inside them. I think that would be good as I hit them pretty hard on a regular basis but not all the balls bounce. Some stay put. Some look flat. Some felt frayed, and some went bald. I understand the felt coming off but wish most of them would have retained their bounce, instead it seems like half retained their bounce and the rest bounce worse than a 2 month old ball under pressure. I'll try another brand of no pressure balls and see if they work better, otherwise I'd rather just use "trainer" style beach balls which are $1 a can.