Constructed from ultra-strong 100% High-Density Non-Corrosive Polyethylene fibers, our Premium Poly Batting Cage Nets (formally ou Armadillos) now offer even higher breaking strengths and abrasion resistance. The Armadillo is constructed with the full complement of Premium features, more features than any other poly cage net. SPI Premium Poly Batting Cage Nets are sure to remain the markets leading POLY net.