The 830 Twin Square is the result of a long work with the Fire Brigade of Paris to design their new suit.The objective is to improve the protection of the wearer by using technical fabrics while promoting comfort. These innovations protect every BSPP firefighter on a daily basis.
Thermal barrier: Nomex Twin Square
The innovation of the Twin Square fabric lies in its construction and in the choice of raw materials.
Its original structure combines the advantages of the Nomex® on the front face and the aramid para on the back face, creating a surface capable of reacting to heat flows.
Indeed, in the event of a flashover, the fabric will thicken instantly, creating additional air space, thus improving the protection of the firefighter.
Para aramid provides very high mechanical resistance (tensile and tear strength); placed on the inside, it is protected from UV rays, which allows the fabric to retain its properties over time.
Twin Square also has very high air permeability, which allows better ventilation and helps reduce the firefighter's heat stress.
Waterproof membrane: SIO-A.I.R. PTFE
In their risk analysis firemen sometimes demand that the membrane is not only breathable but also very heat resistant. That's why we developped our own solution the SIO-A.I.R barrier PTFE. We have laminated a base layer of PTFE on a 3D felt of 100% aramid.
The SIO-A.I.R barrier PTFE is tested in accordance with the ISO 6530 standard (Protection against liquid chemicals - Test method for resistance of materials to penetration by liquids). It is waterproof, with a water column of more than 10 metres, even after it has been exposed for 7 seconds to a temperature of 220°C. It also passes the kerosene test.
Finally the membrane also passes after 25 washes at 60°C the ASTM F1671 test which prooves that a selection of virsuses can't penetrate the SIO-A.I.R barrier PTFE membrane.
This membrane has received the SIO-Comfort® quality label which identifies breathable, flame resistant barriers.
Thermal barrier: Techweave
This 3D weave produces a fabric with excellent insulating properties.
The air channel system thus created makes it possible to achieve a level of thermal insulation never before achieved while improving the regulation of heat and sweat that firefighters generate in operation. Thanks to its aramid composition, this lining has very good mechanical resistance.
This fabric improves the comfort of the firefighter thanks to its flexibility and lightness.
50% of Techweave is in direct contact with the skin, which makes Techweave very comfortable.