Bluestorm Easy Pet Potty Training Toilet Pad Park Patch Mat - 3 Layered System-Synthetic Grass - Pan Tray - Great for Dogs/Pets Indoor Use. It's Like Pet Litter Box or Indoor Potty-30&rdquo;x20&rdquo; x 2" New 3-Layer Pet OR Dog Indoor or Outdoor Training Pad/Potty with Synthetic Grass EXTRA LARGE SIZE: 30" x 20" x 2" Made of a synthetic surface that's similar to grass Indoor and Outdoor use, Great for traveling and house breaking for your pets Easy to Clean, only use water