The answer is "quilt." Because thick quilts are covered in winter and thin quilts in summer.

This is a riddle. Riddles mainly refer to the innuendo of things or words for people to guess, and can also be extended to things with mysteries. The riddle originated from the ancient folk in China, and it has evolved for thousands of years. It is a cultural product created by the collective wisdom of the ancient working people in China. On June 7th, 2008, Riddle was approved by the State Council to be included in the second batch of national intangible cultural heritage list.

Other interesting riddles:

1, a piece of cloth is square, covered by the nose and mouth, and two belts are hung on the ears, which is not afraid of sand. Answer: a mask.

2. Who are the ancestors of human beings? -answer: peanuts. Because peanuts (people).

3. Upright stakes. (Type)-Answer: Dear.

4, a row of children, all with their hands behind their backs, lined up in two rows to see if they have hands. (Typing) Answer: Dear.

5, a tube, a stick, a butt, a hard. Answer: Blow the balloon with a pump.