While cotton comforters are a lot warmer than a satin duvet, they are still pretty decent to trap and isolate your body heath. It is a great option for spring, summer, and fall. The only season where the satin comforter is really suitable is winter. However, they really shine in the summer. They do not trap too much heat and your body will remain a lot cooler than when you use other fabrics like cotton and polyester. They make the hot nights a lot more bearable by being softer and cooler than other materials. They are also very breathable which makes sure your bed does not smell as much like sweat as for example when you use cotton.