The Leatt Chest Protector 5.5 Pro HD are Leatt s more protective line of chest protectors.CE Certified for the Chest prEN1621-3 Level 2, Back EN1621-2 Level 2 and Shoulder EN1621-1Flank protectionFFM-French Federation CertifiedHDPE High Density Poly Ethylene hard shell outer protective shieldPerforated 3DF AirFit impact foamMulti layer multi plate articulating designAdjustable flank panels3D design53 ventilation slotsBraceOn neck brace fitting systemFlipFit front and rear functionThe Leatt Chest Protector 5.5 Pro HD has been designed to meet the highest safety approvals for front, back and shoulder impact protection. The Pro HD has added Hardshell flank protection lined with 3DF foam which overlaps with the front and back plates creating an integrating, multi-layer protection area over some of your most vulnerable parts.The protector has a 3D design with eight, multi-layer, articulating plates, for a great fit. It has also been designed to integrate perfectly with all Leatt neck braces