The Tacks 2052 Junior elbow pads showcase pro approved JDP caps. The Joint Discharge Principle (JDP) uses the principle that the cap should disperse energy from an impact away from the fragile joint and into the big surrounding muscles. This concept is applied to the 2052 elbow cap and is widely popular amongst many players in the NHL. To provide great mobility, the Tacks 2052 Junior are designed as a 2-piece construction. The floating bicep guard is constructed with single density foam. In the forearm we have a single density foam overlay which is reinforced with a plastic insert to provide a really good wrap and lightweight protection.