Sleepwear fabrics are designed for comfort and breathability, making them ideal for a good night's rest. Common materials include cotton, known for its softness and moisture-wicking properties, and flannel, which provides warmth during colder months. Another popular option is modal, a semi-synthetic fabric that is smooth and stretchy, offering a luxurious feel. Silk is also favored for its natural sheen and temperature-regulating qualities, while jersey knit is stretchy and comfortable, perfect for casual sleepwear. Each fabric has unique benefits, catering to different preferences and climates.