Sonora-185 fr-fabric certified to EN 11612

August 2019, AITEX lab (Spain) has tested Sonora-185 fr fabric to the new version of safety standard for Protective clothing – Clothing to protect against heat and flame. Sonora-185 confirmed its compliance to ISO EN 11612:2015 and received a new certificate, which you can see below.

XM FireLine Flame Retardant fabric Sonora-185 is a light protective fabric for hot climate made of 80% Cotton / 20% Polyester with flame retardant finishing.
The areas of use might be Transportation of Oil & Gas (pipelines workers), Petrochemical (refineries staff), Utilities (Electrical/Water/Gas service companies personnel) etc.

According to EN ISO 11612:2015, Sonora-185 has been successfully tested to the following tests:

  1. Heat Resistance (ISO 17493:2016) – performance level – PASS

    Sonora-185 results for samples and after 5 washing cycles at 60ºC, according to the standard ISO 6330:2012, method 6N, F drying (tumble dry)








Warp -0,4%
Weft -0,7%

Requirement No layer can ignite No layer
can melt 
No layer shrinks more than 5%


  1. Limited Flame Spread (ISO 15025:2016, Method A) – performance level  A1

    Sonora-185 results for new samples and after 5 washes @60ºC ISO 6330:2012, method 6N, F drying (tumble dry)

  • Flaming to top or either side edge: No – PASS
  • Hole formation: No – PASS
  • Loose waste: No – PASS
  • After flame time (s): No – PASS
  • Afterglow time (s): No – PASS


  1. Determination of Dimensional Change in Domestic Washing and Drying (ISO 5077:2008) – performance level PASS
    In accordance with the Standard EN ISO 11612:2015, the dimensional change shall not exceed ±3%

    Sonora-185 results for new samples and after 5 washes @60ºC ISO 6330:2012, method 6N, F drying (tumble dry)

  • Warp: -0,0 – PASS
  • Weft: -2,0 – PASS
  1. Fabric Tensile Strength and Rupture Elongation (EN ISO 13934-1:2013) – performance level  PASS
  • Wrap: 750N PASS (must resist ≥ 300 N)
  • Weft: 550N PASS (must resist ≥ 300 N)


  1. Radiant Heat (ISO 6942)  performance level C1
  • Average value for RHTI 24 (s): 12,6


Range of HTIa24 
values (s)


Minimum Maximum


7,0 < 20,0


 20,0 < 50,0


 50,0 < 95,0



ª: Heat transfer index, as defined in ISO 6942


  1. Contact Heat (ISO 12127-1:2015)  – performance level F1
  • Average threshold time (S): 7,3

ISO 12127-1:2007 specifies a test method for the determination of contact heat transmission. It is applicable to protective clothing (including hand protectors) and its constituent materials intended to protect against high contact temperatures. ISO 12127-1:2007 is restricted to contact temperatures between 100°C and 500°C.


Threshold time (s)





< 10,0



< 15,0




The performance requirements set out in ISO 11612:2015 are applicable to garments which could be worn for a wide range of end uses, where there is a need for clothing with limited flame spread properties and where the user can be exposed to radiant or convective or contact heat or to molten metal splashes.

Sonora-185 is a high quality cotton rich blend, improved by addition of polyester, provides that Sonora-185 flame retardant fabric combines comfort of natural fibers and durability, higher tear resistance and better colorfastness of polyester.

You can find all the certificates and additional information on the product page.