Super surprise I was thinking gimmick and turned out they're great quality and work great
"I was very happy and honestly surprised at the Quality and the performance of me to be honest I wasn't expecting much I thought it might have been a gimmick I was wrong quality does the job keeps my knee from feeling wobbly. I bought two so I have a backup one 100% happy with the product I hope it doesn't change over time I may buy a couple more just to have"