Is it suitable to wear silk pajamas in winter?

Wearing silk pajamas in winter will not make you feel cold. Silk pajamas keep you warm in winter and cool in summer.

Silk in silk pajamas contains the highest fiber volume gap among all fibers, enabling it to perform bidirectional regulation. When it's cold, it reduces thermal conductivity, providing better insulation than cotton and wool. When it's hot, it can discharge excess heat, keeping the body temperature constant, achieving the effect of keeping warm in winter and cool in summer.

Silk pajamas soothe the nerves, nourish the skin, and promote sleep: The silk protein in silk pajamas consists of 18 natural amino acids, which contain a tiny molecule called the "sleep factor" that has the effect of calming the nerves and eliminating fatigue. It can effectively improve sleep quality, deepen sleep, and eliminate daytime fatigue.

If it's satin, it might feel a little cool when you first touch it. If it's crepe de chine, it definitely won't feel cold. 

Regardless of the type, silk pajamas are ultimately excellent in insulation, which is unquestionable. People's perception that silk feels cool is based on its lightness and thinness. If it's thickened, it provides double the insulation of cotton!