Woot offers Art3d Anti Fatigue Mat - 1/2 Inch Cushioned Kitchen Mats - Comfort & Non Slip Cushion for Standing Desk, Office or Garage Floor (17.3"x28", Majolica Blue) for $10.24 (orig. $12.80). Free shipping for Prime Members.

Product Description:
Enjoy the exceptional blend of decorative style and memory foam comfort with Art3d floor comfort mats enhanced with Bounce Comfort technology. Standing for long periods of time can takes its toll on your back and feet and affect your overall health. Place an anti-fatigue comfort mat where you stand most and enjoy continuous relief while you work. 

• Polypropylene
• Comfort and Quality: It's made of high-quality, soft PVC cushioning which provides a thick cushion to provide support and comfort when standing. Relieves pressure on muscles and joints, and alleviates foot, knee, leg and back discomfort. High-quality material is durable and long-lasting.
• Easy to clean: The surface material of the kitchen mats is made to deter dust and debris and the waterproof material is easy to clean. Simply wipe with a wet cloth, vacuum or sweep to keep clean.
• Multi-use Floor Mat: The Art3d standing pad is exceptional for your office while standing at your desk, the kitchen while doing dishes, the laundry room while folding clothes and while working at your workbench.
• Resilient Material: Built to maintain shape and functionality even after prolonged use in demanding environments.