We use 3mm thick neoprene to make this mask, which is very soft and comfortable to wear. We refer to the shape of ninjas and put it on to become mysterious ninjas
 
 If you have any questions about the product, please leave me a message because of the time difference. I may not be able to reply to you immediately. I will reply to you as soon as I go online     
 
 
 If the product has quality problems, please contact me immediately. I will immediately arrange the return and replacement for you