I’ve seen these on Amazon, made of silicon. Stick to your chest so when you sleep, particularly on your side, it stops the lines forming where the breasts squash together. I can see these would work and reviews look good, except for the fact that you can only use them for a week or so and then chuck. I’m not prepared to throw this silicon away every week, has anyone seen anything similar which isn’t disposable? Ps lots on Amazon call themselves reusable, but only up to a week