This is a multilayer LEVEL 2 back armor that has optimal shock absorption without compromising comfort, ventilation, and flexibility. In case of a fall or a collision, the MEMORY FOAM layers flow individually, distributing the shock and limiting the transmitted energy to the spine and to the whole area of the back. Optimal measurements perfectly fit for all size sets: Length 44 cm (17.32 in), width 22 cm (8.66 in) Thickness 2 cm (0.8 in) Weight: 250 gr. (0.55 lb) This armor fits for those who was waist to shoulder measurements between 46-50 cm (from XS to XXL size garments). Features Four-layer back armor, made of a highly impact-resistant mixture of Nitrite and Polynorbornene rubber that ends up in a memory foam that is multi-impact rated. Designed to be positioned inside the back pocket of any PANDO MOTO jacket or upper part protective gear. Approved, type of protection CB (central back protection)-certified according to EN1621-2:2014 standard, with the highest protection capacity: Level 2. More information