Messy Cats Soft Silicone Litter Mat with Graduating Spikes, 17.75" x 13.75" Soft Silicone spikes graduate from long to short to loosen the litter from your cat's paws Easy to clean non-slip Silicone keeps mat in place Silicone naturally attracts dust and retains any loose litter Universal design to accommodate various style litter boxes Made from FDA-approved food grade silicone. BPA free. PVC free.