All Therafirm products are cool and comfortable? We uses a Micro-Cool Process that helps wick moisture away from the skin so it evaporates faster. This ensures a cool, comfortable feeling in the summer and a warm, cozy feeling in the winter. We also make sure to use the most comfortable waist bands for our pantyhose and tight and the most comfortable band for our knee highs, thigh highs and trouser socks. Comfort is king after all.