What is DWR? Durable Water Repellent Coating for Outdoor Hiking Jackets & Coats
DWR is a durable water repellent coating used on some outdoor clothing, jackets and coats. DWR has revolutionised outdoor pursuits because it allows hiking and trekking jackets and coats to use materials that would not otherwise have been considered waterproof. Gone are the days when, to stay dry, you needed to wear a nylon anorak or cagoule.
DWR - 2 BIG Benefits
Water beads up and rolls off .
So, next time someone tips a glass of vin chaud over you in the pub after a hard day up the mountain, you should be fine! DWR is primarily used on two types of outdoor jacket:
In years gone by no one would have considered wearing a cotton hoody to hike or climb in, but not anymore. With a DWR coating, a hoody can be transformed into a technical high performance garment.
Premium Waterproof and Breathable Fabrics
DWR is often used on high end waterproof and breathable outdoor jackets and coats in conjunction with Goretex, or other premium waterproof and breathable fabrics, to prevent the outer layer of fabric from becoming saturated with water. This saturation, called 'wetting out' or water logging and has 2 serious consequences:
It reduces a jacket’s breathability which, in turn, causes the wearer to become cold and wet. Because the jacket can no longer breathe, it traps evaporated sweat which cools and condenses. In extreme conditions condensation can freeze making hyperthermia a real concern.
A saturated or waterlogged jacket becomes heavy and the damp fabric sags and presses heavily against your skin or base layers. As soon as this happens, water ingression occurs and the wearer can become very wet, very quickly.