The Gore-tex membrane finds its strength in the fact that the expanded polytetrafluoroethylene (ePTFE) layer has over 9 billion (with a ‘b’) pores per square inch. Because of the sheer number of the pores, the actual size of each one is 20,000 times smaller than a water droplet yet 700 times larger than a molecule of water vapor. Naturally that allows sweat to escape while preventing water from getting in.
Previously, this membrane had to be sandwiched or laminated, between the inner lining and outer fabric. This resulted in a very durable, waterproof shell, but it added weight and bulk. With Gore-Tex Active, that waterproof membrane is built into the lining and does not require an outer layer. Gore-tex calls this a “permanent water beading surface” which not only eliminates the outer layer from absorbing water but keeps the weight down to a minimum…
Likely one of, if not the lightest fully waterproof jacket for cyclists, the Gore-Tex Active Bike jacket comes in at a packable 133g. Designed with an ergonomic fit specifically for cycling, the jacket is built with longer sleeves, a drop tail, and a collar meant to keep water out when in an aerodynamic position. In full black it isn’t exactly hi-viz, but it does include reflective accents and logos. When not in use the jacket can be stowed in the front pocket.
Since the water beads up on the surface of the jacket, rain can simply be shaken off with your best impersonation of a wet dog. When it’s not covered in water, the jacket has a matte finish. One of the best features seems to be the claim that this jacket will not lose it’s water repellency over time and will not require additional treatments to keep the inside dry.
As promised, Gore-tex active will also be available in a Run (MTB?) jacket which is slightly heavier (158g) thanks to the hood. Available today on Goreapparel.com or in select retailers, the Bike jacket will set you back $300 while the Run is $330.