I needed to replace those and opted for a pair with velcro. The other one keeps falling and moving. Now I can keep it below 10 in normal situations and less than 20 on laundry days. 5s despite the label. Simple dutilisation, il offre pourtant une souplesse dutilisation qui semble assez large. Because I have a bunion and high arch, all of my weight goes towards the bottom bones of my big and pinky toe. It does not charge well at all. or more importantly, the middle of a phone call for work and "Power Off" comes into my ear. I forget I have it on and their waterproof so I can bath in the Mi band. I?m glad I didn?t go for the narrow as some people suggested these fit wider than other styles, the width is a good fit and the same as my other Birkenstock?s