We always work hard to ensure high quality standards through 3 times quality checks, while we regrettably still come across defective products occasionally (Arm hair clipping, and defective adapters); So if you have anything about the quality of ur items, please kindly let us know. :-)
How to contact seller: Sign in your Amazon account > Choose "Your Orders" > Find that order > Click "Contact seller" on the right side
1. We don't recommend you use this band with daily desk work (or frequently rub with the desk surface), also our team is trying to make it better; Love your bands, enjoy your life.
2. The magnet of the clasp is very strong, no problem with most sports; If ur bands doesn't work good, please kindly contact us for your warranty replacement. :-)
Thank you so much, and have a great time!