Breathable mesh material. This is a donut pillow made by Esmeralda. The top-of-the-line baby pillow, purchased for approximately 10,000 yen. [Breathing Baby Pillow, Slide Type] I bought this not knowing which one would suit my child, but it seems the Geo Pillow fit my child's head better, so I've only used this 2 or 3 times. The cover has been home-cleaned. The cover is white, and I'll include a gray replacement, so please use it for washing. Made in Japan Washable Supports head-turning habits Baby goods Brand: Esmeralda - Material: Mesh Baby