Thin and lightweight fabric with zipper pockets on both sides. Can be worn inside to keep you warm or worn directly as a jacket. There is a pocket inside that makes it easy to store small items such as wallets. Size S is recommended for those who have a weight of 75-45 kg, while the M size is recommended for those who have a weight of 99.3-110.2 lbs (45-50 kg).Size L is recommended for those who have a weight of 110.2 - 121.3 lbs (50 - 55 kg), and the XL size is recommended for those who have a weight of 121.3 - 132.2 lbs (552XL size is recommended for those who have a weight of 132.3 - 154.3 lbs (60 - 70 kg), and the 3XL size is recommended for those who have weight between 143.3 - 155.3 lbs (65 -Size 4XL is recommended for those who have a weight of 165.3 - 187.4 lbs (75 - 85 kg).