Will these temperature regulating protectors keep you cool enough and warm enough while you're sleeping? In theory, yes. Just note that if you have several layers of non-temperature regulating fabrics between you and your protector, you may not reap the all the benefits. Another thing to consider is that there are two sides to your body — the side on your sheet and protector and the other that faces up. If both your sheets and your protector have temperature regulating technology but the blanket on top of you does not, that will affect your overall temperature.