Duvo+ Premium Silica Litter Duvoplus Silica is a cat-friendly, lightweight litter made from silica gel. The pellets ensure quick absorption of urine, keeping the contents of the litter box always dry. Silica guarantees high absorbency and optimal odor control. Urine and odors are neutralized in seconds, and bacteria are trapped in the silica. Additionally, the granules are very fine and soft, making them gentle on sensitive cat paws. This safe, long-lasting, and dust-free litter is ideal for cats and allergy sufferers.