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Without this knowledge, I'll tell you! Sofa cushions generally do not require maintenance! As long as you don't jump on it or put something heavy more than 200 pounds on it for a long time, there is no problem!
Put it in the laundry detergent water and wash it with a brush, absolutely clean.
This is not your own design, I can't find it in a certain treasure.
Go to the place where sofas are sold in Furniture City and ask to see the original post >>>More
If you have a wooden door, you can take a look at Wang Liweiou wooden door, one of the top ten brands and top ten brands of wooden doors in China.
My family made it in the flower and bird market (the store specializing in sofa shops and daily necessities can be customized) has materials that are specially used in winter and summer. My house is also a chaise's sofa, and he will come to measure the size before doing it.