Cotton bed sheets » are bedding made from natural cotton fibers, known for being soft, breathable, and comfortable. They’re popular because they help regulate temperature—cool in summer and cozy in winter—while also being durable and easy to care for. Good-quality cotton sheets often feel smoother and get softer with washing. Common types include percale (crisp and cool) and sateen (smooth and silky) weaves, and they come in different thread counts (a measure of yarn density), with higher counts generally feeling thicker and smoother.