These masks feature a 3-layer construction with an ear-friendly, ultra-fine wire (approx. 6mm) and are individually packaged for hygiene and convenience. - Set Contents: Set of 9 boxes - Quantity: 40 masks per box - Size: Approximately 175mm x 95mm - Features: 3-layer construction, ear-friendly ultra-fine wire (approx. 6mm), individually packaged - Uses: Protection against house dust and PM2.5 ※ Special Note: One box out of the 9 has a torn outer bag (see photo 3).