Features: 1) This is a type of anti-fatigue mat that offers unparalleled air cushioned comfort 2) It greatly reduces stress where work is conducted while standing and for aerobic activities 3) Resistant to mold and mildew, it makes an ideal covering for aerobics studies for home and commercial applications 4) They are easily assembled, interlocking one to another and form a strong but cushioned floor surface with an attractive finishing trim 5) The ridges underneath allow for easy passage of electrical wires and telephone lines