Thank you for viewing. This is a reversible sucking pad for babies. ○ Materials Front: Single gauze under lace double gauze Back: Double gauze Middle: Domet core Snap: Plastic ○ Approximately 8cm x 13cm when snapped closed We recommend putting it in a net or hand washing when washing. This is a handmade item by an amateur. Please refrain from purchasing if you are looking for the perfection of a ready-made product or if you are sensitive to details.