Abstract: A device is used to prevent or lessen the likelihood of a person, prone to snoring and/or sleep apnoea, from experiencing those conditions. The device includes a back-sleep-preventer that keeps the person substantially in a front-sleep position lying on a bed proximate an edge of the bed. The hack-sleep-preventer restricts the person to the front-sleep position to the extent of preventing the person from thereafter rolling away from the edge of the bed to adopt a back-sleep position. This prevents or at least lessens the likelihood of person experiencing snoring and/or sleep apnoea. Anchor-means releasably secures the back-sleep-preventer to the bed-means. The anchor-means is connected to the person or the person's upper garment by a connector-means. When the person gets off and moves away from the bed-means, with the connector-means still connecting the person or the person's garment to the anchor-means, the anchor-means is able to release the back-sleep-preventer from the bed-means.