Imagine your kitty freshening her own litter box with every step—well now it can become a reality with Fresh Step’s Fresh Scent Cat Litter Deodorizing Crystals! These scent-boosting crystals are completely non-toxic and are designed to mix with your feline’s litter to conceal ...Imagine your kitty freshening her own litter box with every step—well now it can become a reality with Fresh Step’s Fresh Scent Cat Litter Deodorizing Crystals! These scent-boosting crystals are completely non-toxic and are designed to mix with your feline’s litter to conceal foul litter box odors. They are also paw-activated, which means they release a Fresh Scent fragrance every time your cat steps! And over time they will disintegrate leaving her litter box residue-free. Simply sprinkle them over your kitty’s litter and let the crystals work their magic!