Neoprene Imported SIMULATE HIGH-ALTITUDE TRAINING: Boost your lung capacity, improve your stamina, and break through your limits with our workout mask CHOOSE YOUR INTENSITY LEVEL: Personalize your training with 24 resistance levels designed for beginners to pros FITS COMFORTABLY: Our universal fit sleeve and anatomical grip mask make this exercise mask fully functional without compromising comfort EASY TO CLEAN: Use our included cleaning spray and cloth to maintain hygiene after each workout BUILT TO LAST: Our gym mask is made of ultra-durable ABS plastic and comes with a zipper case for easy storage and transport When shopping, please pay attention to the size and dimensions of the product to ensure that it meets your needs. In the title and , we have provided detailed information about the product, including its features and specifications We want you to be completely satisfied with your purchase, so if you have any questions or concerns, please don''t hesitate to contact us. We are here to help and will do our best to assist you. Thank you for choosing our product. We hope you enjoy it!