We use 3mm thick neoprene to make this mask. It is very soft and comfortable to wear. It is suitable for long-term wear and can be used with eye mask and mouth plug
 
      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