Motorfist eVent Waterproof Fabric Information

eVent fabrics get their unique properties from a proprietary and patented waterproof membrane. It is pretty amazing how breathable membrane fabrics work. Typically the membrane is made of PTFE, which is essentially plumbers tape. The PTFE has lots of microscopic holes all over it. These holes are sized so that the larger water molecules from the outside cannot get through but the smaller sweat gas molecules from the inside can escape. The PTFE membrane itself works very well but unfortunately it is very fragile and can be easily clogged by oils and skin particles. Therefore the PTFE must be protected and most membrane manufacturers simply laminate a thin layer of polyurethane over the top. While this gives the PTFE the protection it needs to hold up to regular use it takes away a lot of the membranes breathability. What makes eVent so unique is that they figured out a way to coat the individual fibers of PTFE with polyurethane so that the PTFE is protected but still has open pores so that it can breathe. eVent call this Direct VentingTM Technology. eVent fabrics simply let the sweat out.TM The result is the most breathable membrane fabric on the market and one that is currently rocking the outdoor industry.

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