Strike King Coffee Tubes (Patent Pending) are scented with real coffee bean granules and coffee bean oil. This natural organicscent is incredibly attractive to fish. It causes them to hold ontothe tube longer and masks human and plastic scents. Coffee granules give the tube a more natural earth tone tint that mimics the appearance of a bass’ favorite prey. They are salt impregnated too. As a result these Coffee Tubes will help you catch more fish.