I bought this because it had great reviews online for preventing flat head in babies. I used it for about three months, starting around one month after birth. Helmet therapy is expensive, so I tried this to shape my baby's head nicely, and it worked well. I think it's also recommended for preparing for childbirth. I washed it every time it got dirty, so I think it's in good condition, but there might be some overlooked spots. Please refrain from purchasing if you are concerned about this. The following is from the official website: An essential item for "marumaru nen-ne" (cuddling sleep) to maintain the baby's C-curve in the back. It's a neck pillow that protects the baby's neck. Using My Pilo Neo+ stabilizes the head position even when in a rounded posture, ensuring the airway is open for easier breathing. Also, the beads inside gently stimulate and care for the back of the neck. Different colors are also available.