I'm writing a fanfic for the old Disney Mulan movie, but I'm unable to write some scenes properly due to a lack of knowledge of what the blankets were made of or how they were made. At first I thought it would be reasonable for the blankets to have been made of silk with cotton insulation, but apparently cotton and wool weren't very common and silk was more for the higher class. The time would have been between the Qin and Tang Dynasties, so around 300 or 500 A.D. Does anyone know what the blankets would have been made of?