This is a directional preference prevention cushion from Toko-chan Belt Aoba. Size: S (Weight目安: up to 7kg) I found this product when I was worried about my baby's head shape, and I used it from newborn to 4 months. It worked! I feel it was more effective than directional preference pillows like Geo Pillow and Esmeralda. Recommended for babies who: ・Turn their head in the same direction