The Adams Plus Flea & Tick Collar for Cats provides immediate relief from biting fleas, ticks, flea larvae, flea eggs, tick nymphs, and tick larvae through contact. This collar prevents reinfestations by breaking the flea life cycle, killing the flea eggs and flea larvae, and providing continuous prevention against new fleas and ticks for up to 7 months. The active ingredients that cover the surface of the collar are rubbed onto the animals fur, and the solution works its way down through your cats natural hair oils and across the body to protect head-to-toe. This collar is fully adjustable and offers a unique break-away feature designed to ensure peace of mind.