I am a clothing manufacturer, and I also make jackets and jackets. There is something wrong with the fabric you said. A better fabric is windproof, waterproof and breathable. Permeability refers to the vapor that can absorb sweat and moisture and can pass through the human body. Exercise depends on the amount of exercise, but you will soon feel refreshed, not that your clothes are wet inside and dry outside. The fabric you mentioned is windproof and waterproof, but it is airtight. Breathable fabric is a superfine fiber fabric with very dense micropores, which can be waterproof, windproof and absorb the steam emitted by human body. The fabric you mentioned is made by inferior manufacturers, and the production process is much simpler than breathable fabric, so the cost is much lower, so you will use this fabric to make clothes, which is also very common in the market. Buying online does have this risk. Have a nice day!