Cotton. GOGO Dino/Dragon: ROAR Grab kids dragon tail and get ready to stomp... photo shows a typical dinosaur tail costume set. Each adorable kids dinosaur costume accessory set includes 1 dinosaur tail + 1 felt dinosaur mask. One Set for Most: Dragon costume for kids: Length 18.9 with elastic band, ensures a snug but not too tight fit. Dinosaur masks for kids party: Width 9.84 Length 7.0; Kids dragon costume set, perfect for 3-10 years old boys girls. Fun All Year: Dinosaur tails for kids party is made of cotton fabric and felt 3D spikes, bright colors. Adjustable waist strap are kid-friendly and easy to fit multiple sizes and wear or take off. Soft Felt Dragon mask, lightweight and comfortable wearing, adjustable. Perfect Party Accessory: Plush green dinosaur costume for kids party, great for toddler cosplay favors like fancy dress costumes, dinosaur birthday party supplies or Christmas and Halloween gifts, dinosaur tails decoration for chairs, A beautiful photo prop for your holiday or birthday photo-shoot. Motivate Our Kids' Curiosity: Little Dinosaurs dragons everywhere Putting on our dragon tail mask and imagine that you are in mysterious Jurassic period. Go ahead, have fun with this .