Sympatex

Sympatex is a brand of waterproof and breathable membrane used in outdoor clothing and footwear. It is a polyester-based material that is designed to keep the wearer dry from both external moisture like rain and snow, and internal moisture like sweat. The membrane is microporous, meaning it has tiny pores that are too small for liquid water to pass through, but large enough for water vapor to escape. This allows for effective moisture management, preventing the buildup of perspiration which can lead to discomfort and hypothermia.

The Sympatex membrane is typically laminated to a face fabric and a lining fabric to create a composite textile. This construction provides durability and a comfortable feel against the skin. The material is also known for its elasticity, which allows it to stretch and adapt to the wearer's movements without compromising its waterproof or breathable properties. This makes it suitable for active pursuits where freedom of movement is important. Sympatex is also claimed to be environmentally friendly, as it is produced without the use of harmful chemicals and is recyclable. It is used in a wide range of products, including jackets, trousers, gloves, and shoes, catering to various outdoor activities such as hiking, skiing, and mountaineering.