Hi, just an idea if you want to stop yourself rolling onto your back in your sleep - wear a big old t-shirt to bed and put a tennis ball on the inside back of your t-shirt, then hold it in place by tying the fabric around the ball with a rubber bad or hair tie on the outside. Hope this makes sense! I did it to stop myself sleeping on my stomach when I had back troubles - it alway woke me up if I rolled over in my sleep!