The Tacks lineup is all about maximum coverage and optimal protection and the Tacks 4052 elbow pads do not disappoint. Although D3O foam is not featured in these elbow pads, the 4052’s 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 4052 elbow cap and is widely popular with many players in the NHL.