[Country of origin] Japan [Quantity] Aerotechno mask x 1, Aerotech inner x 3, [Material] Mask: 85% nylon, 15% polyurethane; [Antibacterial agent] tungsten oxide; [Size] Mask: Approx. H 3.1 - 3.5 inches (8.0 - 9.0 x 17 - 18 cm); Ear strap: Approx. 1110 inches (280 inches (280 mm) *The ear strap will be shipped untied Inner: Approx. H 3.1 inches (80 mm) x W 4.7 inches (120 mm) (slight variation); Color: White; How to Use: <1> When using the "Aero-Techno inner" (sold separately), please insert it through the pocket opening inside the mask. <2> Attach the string to the ears so the tag is at the bottom left. Please tie the ear strap to a suitable length. <3> Stretch the bottom part of the mask to the tip of your jaw and adjust it to fit your face. Care Instructions: <1>Hand wash in cold water after first use. Do not use detergent or hot water. <2> Washing instructions should be pressed and washed in 30 to 60 seconds. <3>After washing with water, dry in a well-ventilated place. Also features quick drying. Do not tumble dry or iron. <4>50 times per sheet can be used repeatedly. Precautions for Use: The functionality may deteriorate if used over 50 times. This product does not protect against harmful gases and dust. Please do not use if there is any skin abnormalities. If symptoms such as itching, swelling, or itching appear during use, stop using immediately and consult a dermatologist. If you feel uncomfortable due to the smell, please stop using it. If both the mask and the inner part have ripped or frayed, stop using and replace with a new one. Do not use near fire.