MATERIAL--This Bat mask is made of PVC. The material is safe and non-toxic, comfortable to wear. SIZE--One size for most adults. It fits your head, don't worry about it falling off. It is comfortable and breathable. This will add more joyful MORE FUN--This Bruce mask is suitable for cosplay, Halloween, Christmas, Easter, carnival, or other parties. You can also have a mask party with your family at home. More fun about masks is waiting for you to discover! GOOD SERVICE--We hope that our masks can bring you a lot of fun. If you are not satisfied with the product, you can return it for a refund. And if you have any questions, please feel free to contact us.