In the past, fluoride with long carbon chain was used for water repellent function. This kind of material has certain harm to the environment. In the production process, it is easy to produce other by-products that cannot be decomposed, which has a huge impact on the environment and human health. DWR^Bio is a kind of PFC-free fabric treatment technology based on renewable sources of plants. It is made of 60% renewable raw materials. It is durable water repellent and has passed bluesign® certification.