At Purchase Green, we offer an assortment of artificial grass products and some of our artificial grass products exhibit a directional or nondirectional grass pile direction. For the best result cleaning debris and properly combing your grass blades, make sure to go against the grass pile direction. By doing so, the PerfectGroom agitates the blade fibers causing them to retain their original appearance. Furthermore, grooming against the grass pile direction allows debris to be displaced and removed easier.