Nikwax Analogy
From Wikipedia, the free encyclopedia
Nikwax Analogy is an alternative fabric for breathable wind and water resistant outdoor clothing. Based on "biomimicry" of fur, this fabric combines wicking and convection with activity of the wearer: that is, not a barrier, but a transport of , literally, unneeded moisture next to the skin. Currently used in the in the Paramo [1], Cioch [2], HillTrek [3], and Finisterre [4] brands of clothing, where it has a following among mountaineers and other active, regardless the weather outdoor users.[5][6]
[edit] Technology
Unlike a conventional waterproof fabric, Analogy would fail a hydrostatic head test (if used to seal the bottom of a tube containing water, only a very short column could be supported). However, like fur, Analogy causes water to flow away from the body of the wearer in activity. [7] This operates when exposed to rain and also wicks sweat away from the wearer, providing an unusually high level of breathability. It even dries out the garment and wearer after immersion, or places where the garment has become wet.. The wicking ability of Analogy is so high that users have reported seeing expelled moisture as "steam" during rest stops.[8]
Claimed additional benefits of the fabric is the ability to continue providing water resistance when punctured (the surrounding fabric draws away any water that enters), and it's "soft" feel and lack of a rustling noise. [9] Analogy does not need the taped seams required by e.g. Goretex rain-wear, this together with its resistance to leakage due to punctures makes repairs easier. Unlike "membrane"-designed rain wear, an Analogy garment can be easily repaired with a needle and thread with no loss of function. [10]
A disadvantage of the fabric is that it inevitably adds insulation, due to the inner liner that provides wicking, making it less suitable for higher temperature conditions(above 70F/20C) and users who "run hot". [11] Clothes made from Analogy can also be heavy compared to lighter weight water proof "shells"(or "membrane"-based), but not to the combined weight of these and an insulating(?) layer, and are relatively expensive.[12] However; it is designed to be worn next to the skin, or with minimal baselayer(i.e. not cotton), and also intended for activity to function best. For those accustomed to wearing a fleece, or cotton shirt under this garment as a "raincoat": a "raincoat" it is not. Rather, regardless the garment manufacturer, this fabric is intended, and meets, exclusion of multiple layered "water proof" and "insulation" by design. It does not add insulation, but insulates by removing, literally, the chill of being wet. Made of polyester fibres, it is hydrophobic, but must be cleaned well to avoid uncomfortable odor.
[edit] Clothes and Market
The main user of Analogy is Nikwax's sister company Paramo(and those listed above). While Paramo clothes have a cult following among UK mountaineers, mountain rescue teams [13], and the military[14], Paramo distribution and marketing to the mass market and outside the UK seem to be extremely limited[15]. So too the other vendors of garments made with this, or other Nikwax fabric.
Recent Analogy garments are designed to replace several layers of a conventional a "layering system"[16], by using adjustable vents and other features that allow ventilation to be controlled without moving layers; see also [17]
