Knee: Single-density base layer, Molded PE (plastic) cap Shin Shell: Plastic exterior shell w/ bridge support (ridges), HD (high density) foam wrap guard on bottom Calf: Single-density base layer w/ extended single-density foam calf wrap Dome Cap/Knee Wing: Single-density foam knee wing Straps: 2-piece strapping system - wrap lock strap around knee, elastic calf strap Liner: Anatomical removable liner. Brushed Nylon lining w/ comfort padding Thigh Guard: Single-density thigh guard