When you wear your compression stocking all day, they stretch out on your legs. So at the end of the day when you take off your stockings, you can see that they are larger than when you originally pulled them out of the package. This is called fabric fatigue. All compression socks and stockings get tired after a day on your legs and can change in shape by about 15% over the course of the day.
Washing your compression stocking not only cleans the fabric, it also allows the compression stocking to return to their original shape and size. Washing your compression stocking in cold water and gentle soap refreshes the fabric and threads so that they can provide support to your legs the next time you put them on.
Fit is very important, so washing your compression stockings daily is an important step to having them wear comfortably on your leg.