Head Quantity: Each pack contains 28 refill heads compatible with Reach Ultraclean Access Flosser Handles, Flavor Additive: Each floss head is coated with a mint flavor to enhance the user experience during flossing, Floss Material: Shred-resistant nylon strand made of polytetrafluoroethylene (PTFE) for smooth gliding and durability, Surface Technology: Micro-grooved floss surface designed to remove up to 40% more particles between teeth, Attachment Mechanism: Snap-on mechanism ensures a secure fit on compatible handles