Holmes 2 Pack “W” Replacement Humidifier Filters Model HCM3888 & HCM3888B, New 
Holmes cool mist replacement wick filter 2 pack type W for models HCM3888C and HCM3888B. Anti-microbial protection is infused into the wick to help prevent the growth of bacteria that can cause stains and odors or adversely affect performance. The filter has been enhanced with baking soda which naturally deodorizes the air by absorbing and reducing odors.  Brand New