BOOMCARE Boom Mask with 10 replacement filters

Boom Mask (Refillable filter  Mask) Nano Filter + disposable melt blown filter(refillable) + exhaust valve Specifications Double filtration (Nano filter + MB filter (used for KF 94 mask)) Easier breathing with exhaust valve Washable frame and refillable filter What is included 1 Frame (PP/TPE)-fixed nano filter (PET+ EVA + Nano fiber) 10 refill filters 2 mask loops (cotton, elastic) 1 mask clip What is nano-filter? (attached to the frame) Nano fiber filters form very thin fiber webs that filter out small particles such as bacteria, micro dust, and pollens. Washable and reusable