The DWR coating makes the fabric water repellent, so that water forms droplets on its surface and runs off instead of soaking in. This protects the fabric from getting wet quickly, providing greater comfort in wet conditions, but does not guarantee full water repellency.

This ultralight nylon windproof fabric has a specific weight of 40g/m? and the fibres are as fine as silk. At the same time, the fabric is reinforced with ripstop. The fibres of the Pertex® fabric are so densely woven that fine feathers of insulation cannot pass through them. Pertex® fabric is windproof and waterproof.