The membrane is the waterproof part of the fabric and keeps the moisture out, the membrane has microscopically small holes that keep the water drops out but release the smaller particles from the body's water vapor.

RevolutionRace uses a fluorocarbon-free DWR in all its products. The function of the outer material is to be durable and look good, it is not waterproof but treated with a DWR (Durable Water Repellent) so it does not absorb water. Waterproof materials that breathe are made of an outer material, a waterproof membrane laminated on the inside and often a third material inside the membrane for comfort. How do waterproof materials that breathe work? RevolutionRace tests the breathability of all waterproof garments in real life, out in nature in varying weather conditions and seasons to ensure functionality. Outdoor temperature, humidity, activity, rain, sun, everything matters to how good a garment's breathability is. Lab testing is a good way to get a measure of breathability but it is more complicated. It is measured in g / m2 / 24h, ie the amount of liquid, measured in grams, a square meter of fabric can release in a day. Breathability is a measure of a material's ability to release body moisture. We also test all garments in nature with real weather conditions at different temperatures and seasons to ensure optimal functionality.īreathability Like water column, breathability is measured in a lab. It is also a certificate for you as a customer that the garment's fabric has been tested for its water resistance. We test all waterproof garments' water column in a lab and label them with water column so that you can easily get an overview of how waterproof that particular garment is. Withstands heavy rain, wet snow, with high pressure. Moderate rain, average snow, light pressure.Ĭan handle long trips in heavy rain, wet snow, a little pressure. Withstands light rain, moderate snow, light pressure. Then the garment has a water column of 15 000 mm. When you have filled the tube up to 15 000 mm, ie 15 meters, the water passes through the material. Imagine placing a glass tube on a garment and refilling it with water. Water column describes the water pressure in millimeters that the material can handle before the water penetrates the material. Water column overview Water column, also called water column pressure, is a measure of how much water pressure the material can withstand before it lets water through.

Water column geo duck