Why did the quilt become wet when it was put on the tree wall to dry?

Because in the daytime, the intensity of sunlight is greater, at this time, plants or walls are covered by quilts, which absorb less heat. At this time, the temperature of quilts will greatly exceed the temperature of trees or walls, while in the afternoon, the intensity of sunlight will weaken, and at this time, the quilt will release heat because the temperature is higher than the atmospheric temperature, which will still release more heat than the area covered by bask in the quilt, because the vaporization caused by temperature difference is generated in this area. So your quilt will be wet.

At the same time, it is suggested that you don't cover the quilt too much on something, especially the objects with weak heat dissipation, when you go to bask in the quilt next time. Because of the sun on iron wire, balcony or iron guardrail and other objects with strong heat dissipation.