Richell's Paw Trax Super Absorbent Training Pads Are Designed For Use With The Paw Trax Tray Or Can Be Used Alone. The Pads Are A Definite Must Have For Pet Parents. Use Them For Potty Training Your New Pup, Longtime Companion Pet, Or When Your Little Pal Is Not Feeling So Special. Great For All Indoor Pets! The Pad Surface Dries In Seconds! Tray Sold Separately.