Now with kidney belt!Multi-layer multi-plate articulating design.Ventilation slots for maximum cooling.Perforated 3DF foam helps air flow.Hard shell outer shield made of High Density Poly Ethylene (HDPE).BraceOn neck brace fitting system.CE EN1621-2 level 2 back certified for impact protection.CE EN1621-3 level 2 front certified for impact protection.CE EN1621-1 elbows shoulder certified for impact protection.Sizing Information:Adult Small/Medium......... 5'3" – 5'8"Adult Large/X-Large........ 5'8" – 6'Adult XX-Large............. 6' – 6'5"