Three-pack of AIRINUM Lite Air Filter - Optimal, offering 100 hours of use, featuring multi-layer filter technology, perfect for masks. Includes one mask and six replacement filters. 32 boxes of three-packs at ¥2,530 each. Unopened. One box of Polar White color masks at ¥4950. All are size L. Designed by Japanese designer NIGO®, the "HUMAN MADE®" brand has collaborated with Alan Walker, UNDERCOVER, and Marine Serre, becoming a hot topic and selling out quickly in Japan. Thank you for viewing. - Brand: AIRINUM - Model: Lite Air Filter - Optimal - Quantity: 3 filters - Compatibility: Compatible with AIRINUM Lite Air Mask - Usage: Each filter lasts about 100 hours of usage. - Features: Multi-layer filter technology for enhanced protection and breathability. - Price: