Knee: Single-density base layer, Molded PE (plastic) capShin Shell: Plastic exterior shell w/ bridge support (ridges), HD (high density) foam wrap guard on bottomCalf: Single-density base layer w/ extended single-density foam calf wrapDome Cap/Knee Wing: Single-density foam knee wingStraps: 2-piece strapping system - wrap lock strap around knee, elastic calf strapLiner: Anatomical removable liner. Brushed Nylon lining w/ comfort paddingThigh Guard: Single-density thigh guard