Team ionic band purple and whitefeatureslifetime warranty17 wider joint for added robustnessdurable laser cut countersunk writingdesign improvements over the mk1ce marked complies with all european health safety environmental protection legislationwhat size band should i buyhow tight you wear the band is based on personal preference some people like to wear it loose and able to move some like it to fit snugly and not move during sports measure around your wrist using a piece of string