At work I get to take out crates of produce garbage. Crates of old fruit, berries and vegetables. The garbage that touches my pants usually doesn't leave a mark whereas if I'm wearing other pants the pants look dirty afterword. I guess they call that stain resistant? Even after hauling out the garbage my pants usually look as good as what management wears. Strong fabric and stitching so the pants will last a long time. They are easy to wash and dry. The fabric is about 65% polyester. Not good for hot weather but excellent for cooler weather. I wish the front pockets were deeper and it would be awesome if the pants had cargo pockets with everything else the same.