These PJ's are colorful and comfortable. The material is a bit thinner than expected, and are probably better suited to be spring/summer/ fall sleepwear. For winter weather wear, I would recommend the thermal type longjohns and a regular cotton tee shirt be worn under them. I guess that may depend on where you live, and what your thermostat is set at, but they are more like a typical flannel shirt than something made with warmth in mind. However, I do like them.See full review