HIGHEST-QUALITY FIBERS:Exclusive synthetic antimicrobial fibersEngineered to better hold, apply + blend productsFERRULES WITH UNMATCHED STRENGTH:Durable + corrosion-resistant SigmaAlloy™Precious metal plating for shine + strengthExclusive, patented interlocking technologyDouble-threaded engineeringSLEEK, DURABLE HANDLES:Solid polymer-based handles are waterproofOutlasts all product formulas + frequent brush care