We have developed and homologated a contention system for vehicles, by creating a metallic soul covered with wood so that its integration both environmentally and visually is much more adequate than those created with other materials. This barrier named NATURPROTEC has been tested with real-size vehicles as stated by law EN-1317 successfully completing all of the testing done (TB11 and TB32), having proven itself for a contention N2 class, with very adequate work values: working width W4 (below 1,3m) and Severity A Class (the best possible option). We also elaborate other complementary products such as signs, fencing or wooden piles.