This track jacket is made of water-repellent taffeta fabric and is filled with Thinsulate™ padding, providing excellent cold protection. The characteristic of the DANTOTSU Water-Repellent® fabric is that it is a special material that makes it easy for water droplets to roll off by making the contact angle between the fabric and water droplets obtuse, allowing for excellent water drainage. Thinsulate™ padding is a high-performance material researched and developed by 3M. It is made of a combination of microfibers that are almost as thin as the tips of feathers and polyester fibers, and contains a lot of air, making it excellent at insulating and retaining heat . There is also an elastic cord at the hem, so you can tighten it according to the situation.