We use 3mm thick neoprene to make this mask which is very soft and comfortable to wear for a long time
 
      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