Aviditi Airug Anti-Fatigue Mat, 3' X 9', Gray (MAT114GY): Industrial & Scientific. Aviditi Airug Anti-Fatigue Mat, 3' X 9', Gray (MAT114GY): Industrial & Scientific. ' x 9' Gray Economy Anti-Fatigue Mat. Basic anti-fatigue protection. PVC closed cell foam relieves leg and back discomfort. Provides a barrier to cold floors. All four sides are beveled to minimize trip hazards. /8" thickness. 。 。 。