Buff Adult 30 Pack Mask Replacement Filters - 30 Pack of replacement filters for the BUFF® Filter Mask. Highly breathable to guarantee your comfort throughout the day. Not intended for medical use Filters offer 98% bacterial filtration efficiency Each filter can be used for a maximum of 24 hours Filter life may vary based on usage and environment Adult Filter Packs fit Adult Filter Masks and Adult Filter Tubes Made in Germany Packed and sealed in a clean sterile environment Style: 126658-000