Neat feet. Neat floors. Guaranteed. Anti-tracking pellets repel & wick away moisture. Replace monthly (30 days). How Breeze Works: 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. Purina - Your pet, our passion.