Comfort they can enjoy, protection you can trust with Hartz UltraGuard ProMax Flea & Tick Collar for Cats & Kittens. Our comfort technology is backed by our unique patented design to provide the most soft and comfortable flea & tick collar for cats to sport all year long. Most importantly, this collar kills and repels fleas, ticks, flea eggs and flea larvae, while also preventing flea eggs from hatching. UltraGuard ProMax Cat Collars have outward facing ridges to prevent skin irritation, a long-tapered end to ensure a quick & easy application, a secure dual buckle system, and a pre-determined breakaway point for an additional layer of safety. Each tin comes with 2, 7-month collars that provide 14 consecutive months of head to tail flea & tick protection – perfect for yearly usage or multi-cat households.