Boasting EN certification & constructed of flexible expanded nitrile rubber, the Pro-Armor Lumbar is extremely comfortable while still offering excellent lower-back protection. Ergonomics Dynamic thickness Anatomical shape Adjustable lumbar band Longitudinal bending Main Materials Expanded nitrile rubber Performance Shock Lumbar protector certified to EN 1621.2/2014 lev. 1 Funcional pattern Temperature Perforated structure