Next level odor fighters. Anti-tracking pellets with improved fecal odor control. 30 Days: Replace monthly. 3.5 lb refill. Pellets allow liquids to pass through to be locked away in the pad below. Solids stay on top for fast, easy scooping. Anti-tracking, 99.9% dust-free pellets minimize mess around the box. Active clean scent controls fecal odor on contact. Breeze litter systems & cat pads also sold separately. Original pellets also available. Refills compatible with all Breeze systems. Cat pads available in multiple varieties. Your pet, our passion.