The pillow covers are breathable and skin-friendly for a comfortable sleeping experience.Product information:Pillow filler: polyurethaneOuter pillowcase material: velvet fabricInner pillowcase material: stretch knitted fabric (polyester fiber)The pillows are packed in compressed packaging when they arrive. In order to get the best use effect, prepare as follows:1. Open the plastic packaging and take out the pillow2. Strongly comb the pillow and wait for 24 hours3. Once it is completely soft, please use a pillow.Customer satisfaction is our top priority, we are so confident in the of our pillows.