Felight Cat Litter 20LBob Martin Felight Antibacterial Cat Litter is a super light and effective litter which has been designed and manufactured with the ultimate odour control technology. By quickly drying and absorbing the smell, this litter gives odour less chance of escaping and filling the room. Each granule has thousands of fast acting micropores which quickly absorb liquid like a sponge, instantly trapping unpleasant odours.