The Andersen Company No. 4210 Hog Heaven III Linkable w/Grit Middle is a static-dissipative mat that has a top surface made from solid 20% recycled nitrile rubber, which provides excellent chemical and oil resistance. This closed-cell nitrile rubber surface is molded to the cushion backing and not glued, which means it will not delaminate over time and will provide long-lasting comfort. This surface will also remain flexible over the life of this product and will not curl or crack. The Hog Heaven II mat features outstanding anti-fatigue qualities, is certified slip-resistant by the National Floor Safety Institute, and recommended for a variety of applications in distribution, manufacturing and retail environments. This mat is also welding safe.