Trust Hp Internal Knee Pad Black D3ONew age knee protector from D3O Trauma Reduction and Unrivaled Shock Technology (TRUST) range. The D3O TRUST HP Internal knee pad system is an innovative protective solution and the latest addition to D3O's Trauma Reduction and Unrivaled Shock Technology (TRUST) range. The two piece system comprises an internal knee pad featuring D3O's unique patented shock absorbing technology, teamed with a detachable hard shell which fastens onto the outside of the