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SGS offers breathability tests for waterproof clothing
Sep '13
Many outdoor jackets or rainwear may be labeled with functional claims such as waterproof breathable. The shell fabrics may be treated with finishes, coating or lamination to achieve the waterproof breathable function.

However, if an improper treatment is applied, it may reduce the breathability and therefore inhibit the evaporation of sweat from skin, which may cause discomfort. There are various methods used to assess the water vapor permeability of textiles.

Comparison of Testing Methods for Water Vapor Permeability


- Cup methods
- Upright cup for water permeable fabric
- Inverted cup for water impermeable fabric

JIS L 1099

- Cup methods
- Upright cup for water permeable fabric
- Inverted cup for water impermeable fabric (for single membrane method)
- Inverted cup for water permeable or water impermeable fabric (for double membrane method)

ISO 15496

- Cup method
- Inverted cup for water permeable or water impermeable fabric (double membrane method)

BS 7209

- Cup method
- Only upright orientation
- Cup is moving on a turntable

Various Water Vapor Permeability Testing Methods and Procedures

Water Vapor Transmission ASTM E96, JIS L 1099,ISO 15496, Water Vapor Permeability (WVP), BS 7209 and differences between BS 7209 and other cup methods as well as differences between cup methods and sweating hot plate methods are summarized within the latest Safeguards bulletin.

About SGS Softlines Services

SGS Global Softlines has an extensive network of over 40 laboratories worldwide, with a strong team of committed professionals from multi-disciplinary backgrounds.

The SGS internationally accredited state-of-the-art testing laboratories offer a comprehensive range of physical, chemical and functional testing services for components, materials and finished products. SGS can help your company ensure quality, performance and compliance with international, industrial and regulatory standards worldwide.


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