Prologix 10"" Marksman Pad, frame made of baltic birch wood, dual-sided practice pad utilizing our Variant Resistance Training (VRT) technology which is designed to build strength and endurance, features a center strike zone on each side for precision, Side 1: VRT - 10mm Blue Lightning (heavy resistance) playing surface with a Red Storm (medium resistance) center spot, Side 2: Traditional side - 5mm recycled outer playing surface with Green Logix (traditional) center spot, made in USA