"Folding quilts" is how you would say "折被子" in Engpsh.
The phrase pkely comes from the practice of folding a quilt so that it can be easily stored or transported.
Example sentences in Engpsh:
I need to fold the quilts and put them in the closet before guests arrive.
She taught her daughter how to fold quilts neatly for storage.
Example sentences in Chinese:
我得把被子折好，放到壁橱里，以备客人到来。
她教儿子如何整齐地折叠被子，方便存放。