Nyantomo Purr Fect Potty Deodorizing Litter Pads Refill, 8 Pads The super absorbent Litter Pads absorbs a week's worth of urine keeping your home odor-free for a week without changing the litter (when used by one cat) Long lasting, exceptionally effective, so simple. #1 selling Cat Litter in the "Two Layer Type" Litter Category in Japan.* *Source from INTAGE MPI data (7/2011 - 6/2013), "Two Layer Type Cat Litter" Category, Accumulative Value base The pull-out tray makes changing pads a snap; Replace only once a week; Pads fold for easy, compact disposal; 100% disposable Nyantomo is a product of Japan and is currently only available at Amazon.com