Used for about half a year. I don't think there are any particular stains. Size: Width 100cm x Length 100cm Easy to install with a tension rod (sold separately). ● Can be used not only for small windows, but also to conceal storage. ● UV cut rate: 87% ● Heat insulation effect: Blocks outside air and prevents the room's air from escaping. ● Obscuring: Processed to make it difficult to see inside from the outside. ● Mirror effect that reflects light from the outside during the day, making it difficult to see inside from the outside. ● Can be washed in a household washing machine.