This garment is primarily composed of polyvinyl alcohol fibre (vinylon) and contains 90% fabric content. It does not include a bladder lining. The loose fit is perfect for summer, with options A, B, and C being made from ice silk material that is both breathable and comfortable. There is also a Spring and Autumn Loose Model D option that is made from ice silk. Keep in mind that Asian sizes tend to run 1 to 2 sizes smaller than European and American sizes, so it is recommended to choose a larger size if you are between sizes. Please also note that there may be slight differences of 2-3cm in measurements due to manual measuring. It is important to check the size chart carefully before purchasing, and if you are unsure about sizing, please reach out to our customer service for assistance. Additionally, please be aware that the colour of the actual garment may differ slightly from the images shown due to variations in computer display settings.