Donut-shaped baby pillow, made of polyester for comfortable support. - Shape: Donut-shaped - Material: 100% Polyester - Filler: Silicone rubber polyurethane - Made in China I didn't use it during the newborn period, but I bought it urgently around 2 months old when I started to worry about flat head syndrome. However, I couldn't use it much because the baby started moving around quickly. I used a different pillow at night, so I used this one for naps. ⚠ Pillowcase is available, but it is not included. I think you can use it as a trial pillow. Thank you for looking.