Whilst my Libre2 sensors are, fortunately, free on the NHS one still feels bereft when you lose one by inadvertently knocking it off! I've lost a few; squeezing into the car and hitting the top of the door, reaching for very hard to reach items in the supermarket and catching it on the shelf. NO MORE! Whilst looking cool (whilst not always visible unless wearing short sleeves) the armband is easy to fit snuggly over the sensor and doesn't move until you want it to. Obviously (and importantly) scanning the sensor with your phone is no different to scanning without the band on. RECOMMENDED!