Microlife WatchBP O3 Cuff Microlife WatchBP Home Cuff for use with WatchBP O3 devices. All WatchBP cuffs are made from hardwearing and durable materials to provide many years of use. Using the wrong size cuff is a major cause for incorrect blood pressure measurement. All cuff bladders are both latex and PVC free Washable cuff cover for long lasting, hygienic use (cuff cover washable in washing machine 43C / 110 F after the bladder has been removed) Available in nylon and cotton, to fulfil hygienic needs in a professional setting *the L-XL cuff has been validated for use among patients with large arms