Cleanroom anti-fatigue mats, Ergomat® Nitril . Nitril is a general application non-porous rubber ergonomic mat that is will not curl, swell or otherwise deteriorate when exposed to oils. In addition to proven ergonomic benefits, the Nitril provides exceptional traction in wet or oily environments for added worker safety. In situations with excessive fluid volume, or the need to promote air flow, Nitril can be die-cut to accommodate these requirements.