Over time, pea gravel has fallen out of favor due to wear issues on ropes, anchors, and other equipment and shredded rubber, although still a viable option, has containment issues as well as having rubber dust and a rubbery odor. In an effort to eliminate these containment issues, Nicros introduced our Nicro-Mulch™ (a natural-looking poured-in-place surface) and Nicro-Mat™ (an EPDM coated, custom-color, poured-in-place surface).