$54.99 Future Foam Prime Comfort 1/2 in. Thick Premium Carpet Pad with SpillSafe Double Sided Moisture 
Poly Foam Ball, White, 1-1/2-Inch, 30-Piece - Walmart.com - Walmart.com
Fitit 1/2 Inch EXTRA Thick EVA Foam Mat with Interlocking Tiles 24 Square Feet - Walmart.com 
