AFS-TEX 4000 Anti-Fatigue Mat, 20 x 30, Midnight BlackAFS TEX Active Anti Fatigue mats are designed to provide the ultimate standing surfaces combining prolonged comfort and effective body support. Reduces the strain on feet, legs, knees and back joints that can be caused through prolonged standing. The mat provides a contoured, non linear ergonomic surface specifically designed for use with standing and height adjustable desks. Contains antimicrobial content to protect the mat surface from microbial