This is an Amethyst nursing pillow often used in maternity hospitals ⟡.· I used this at the maternity hospital I went to, so I bought it because I wasn't satisfied with a regular nursing pillow! I used it 2-3 times, and then I stopped breastfeeding, so I'm selling it! I regret not buying it sooner, it's that good!! It's an air cushion, so it won't sag. You can deflate it and take it with you when you go home or travel! Besides being a nursing pillow, it's also great for babies to practice sitting up.