Sympatex is a high-performance and environmentally friendly membrane technology used in footwear to provide protection against water and wind while maintaining breathability, comfort and warmth. It is a durable membrane that is 100% waterproof with water column >45,000 mm, providing effective protection against rain, snow and slush. Sympatex is renowned for its environmentally friendly manufacturing process that is free of solvents and is produced without the use of fluorinated chemicals In addition, the Sympatex membrane is bluesign certified, ensuring maximum protection for the environment and the consumer. This membrane is 100% PTFE-free.