The No-Wax filter replacement kit helps to maintain the peak performance for Simply Soft and Simply Slim hearing devices. The No-Wax filter blocks earwax from entering the device and prevents the wax from deadening the sound quality. Deluxe No-Wax filter replacement kit comes with 4-packs of No-Wax filters. * 4-packs of disposable replacement No-wax filters (Six filters per pack)