Only premium quality materials, including: Safe-to-chew beechwood ring, the wood is PEFC and FSC certificated. 100 % Cotton Doll Jersey, Ökotex certified. For Stuffing Natural, Ökotex certified 100 % Wool. Binding thread of stretchy terry cloth material on a beechwood ring. Great for babies who are getting their teeth. Beechwood is safe to chew on! This kit contains only premium quality materials, including: Safe-to-chew beech woo. Stretchy terry cloth material. Provided with step by step Dutch, German and English instructions. Size: 25 cm (with ring). Still needed: sewing thread. Very easy to make.