Made of 100% spring crimped nylon material. It will not fade, bunch, weather or leave marks on your clubs.Our Emerald Chip golf mat is .875" thick with a urethane backing that will withstand repeated abuse. Our dense fiber mat allows you to feel the difference on a fat shot because if you go to deep the thick fibers will slow your clubhead speed resulting in a fat shot. In practice you will learn to eliminate your mishit shots. Our competitors golf mat will "bounce" which will result in mishit shots. Our mat lets you hit down and through the ball for better practice. All mats (except 13" x 20") come with one 2 1/2" rubber tee and two holes cut for either a right or left handed golfer. It will also hold a regular wooden tee for practicing true on the course shots.