Aoba Toko-chan Belt, Baby Hug, and a positional plagiocephaly prevention cushion. I found it very useful for my child, though it was for a short period. It's sturdy and still usable, so please consider it if you're interested. ----------------------------------- The following is quoted from the official website: ◎ Reduces positional preference and head shape distortion A cushion that cares for positional preference while the baby is sleeping. It supports the entire body, stabilizing the sleeping posture, and allows you to gently turn the baby's head to either side. Please use it in conjunction with care to relieve body stiffness and tension. It is also used in maternity facilities. ◎ For babies like this: ・Always turns their head in the same direction ・Concerned about head shape distortion ・Aiming for a round head