CPAP therapy works by applying a constant stream of air to your airways, preventing them from closing and causing a blockage. This therapy prevents the sleep pauses that occur hundreds of times every night so you can get the restorative sleep you need (and so can your sleep partner). With CPAP therapy, you also put to rest the complications that arise from oxygen deprivation caused by sleep apnoea -- so your overall health improves as well. Free UK delivery.