TRYONIC Feel 3.7 Back ProtectorTRYONIC Feel 3. 7 Back Protector CE Level 2: Maximum level of protection. The TRYONIC FEEL 3. 7 back protector complies with the EN1621 2 CE level 2 standard and is tested to this full standard in temperatures of 20 to +40 degrees centigrade. Technical features: Anti penetration outer shell The polypropylene outer shell provides maximum protection against penetration, this is a major point of difference with soft back protectors Ergonomic design The