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Porelle® Dry

Porelle® dry is a waterproof and breathable microporous polyurethane membrane that is light, flexible and durable. Available in thickness options: 30, 45 and 55 µm.

The key feature of the porelle® dry is its dry feel when used in active apparel applications.

Porelle® dry is produced by a unique novel coating process, creating a uniform micro-structure. This ensures consistent waterproofness levels even after multiple washes. Some competitor products have irregular cell structures, with large pores which can inherently lead to failure causing decreases in waterproofness and breathability.


Its solid structure consists of many small interconnecting micro pores less than 1 µm in diameter. This allows the membrane to breathe by absorbing and dissipating sweat through the diffusion of water vapour molecules.

Waterproof Porelle® Membranes

A key function of membrane technology used in apparel is to ensure that it remains waterproof in use to keep the user dry and comfortable. However, when we work hard we sweat. If the sweat becomes trapped inside the garment it can create a micro-climate and quickly form a wet layer, eventually leaving the user feeling cold. The solution is to use membranes that are both waterproof and breathable.

Hydrophilic films can swell and retain moisture. This is due to chains of chemical groups within the solid structure that attract and hold onto the water vapour molecules. This retention  in the structure changes the nature and character of the film, creating a wet feel, which can be felt by the user as an uncomfortable, clammy, cold sensation.

Porelle® dry is hydrophobic (water hating) and repels water droplets, even under high pressure. At the same time the membrane breathes and dissipates sweat from within the garment. In use porelle® dry is waterproof, breathable and gives a dry feel, offering the optimum comfort performance.

The science of film technology in the sports and leisure market often relies on waterproofness and breathability test data as a means to define the value of comfort.

To define true comfort requires life trials and user feedback, field test porelle® dry films and make your own conclusions.

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