top-tier for anybody with back pain, foot pain, leg pain. Since I teach PE, serve tables, and chase my three little children around. I'm pretty much always on my feet... using this Naboso ball is way better than a tennis ball or a lacrosse ball ( which I've done both.) I just genuinely like this product and won't gate keep when I find keepers! Also, the insoles are legit. here's their accounts# if you find this useful @naboso_technology @getstepprs #foothealth #naboso #archsupport #wellnessmadeeasy