Edelrid ropes get a new finishing treatment

All Edelrid Pro Line ropes now feature a new finishing treatment
called Pro Dry impregnation. This process ensures that ropes only absorb a maximum of one to two per cent of their weight in water.

Edelrid Swift Pro Dry

We were fascinated to learn that untreated ropes can absorb up to 50 per cent of their own weight. This is particularly relevant to ropes that often get wet during use, for example during high alpine mountaineering.

This is an important thing to consider as non-impregnated ropes can become heavy when wet; they are harder to handle and may even freeze in cold conditions. Most importantly when dangling from the side of a mountain – their safety reserves are compromised.

We were lucky enough to be shown how they treat and test the rope at the recent Outdoor trade show. Not content with just treating the sheath, Edelrid go one step further… Firstly, the individual core strands are impregnated separately. Once the core and sheath strands have been braided together the finished rope is treated again.


In a final stage, the impregnation is thermally fixed. The result is a rope that is durably water repellent and dirt resistant, particularly fast drying and that will not freeze easily in colder temperatures. And if that isn’t enough wow –  they discovered that the newly developed impregnation also improves the gliding characteristics of the individual fibbers improving abrasion resistance and thus increases the lifespan of the rope.

Ederid’s Pro Dry ropes are tested for water absorption using the UIAA Water Repellent Test. During this test, a rope sample is first prepared to simulate abrasion from rock and ice by being pulled through a wearing apparatus so that it’s entire surface is mechanically abraded. The rope sample is then subjected to a water flow of two litres per minute for fifteen minutes. Finally, the wet rope sample is compared with a dry rope sample and the difference is expressed as a percentage. To pass the UIAA test, the rope may not absorb more than five per cent of its own weight in water.
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