Onikoma High School Design PM2.5-compatible Mask 30 masks per pack. - Brand: Haikyu!! - Model Name: Onikoma High School Mask - Quantity: 30 masks - PM2.5 Protection: Yes - Size: Regular (approx. 12.5cm x 9.5cm) * Masks will be shipped without the outer box (outer box included). * Waterproofing measures will be taken. * Please refrain from purchasing if you are sensitive to items stored at home. * Returns and refunds are not accepted.