The Hyper-Cotton Sheet Set is a classic cotton sheet set that gets a high-tech twist which is lightweight and durable. With the soft feel of cotton, plus the addition of fabric technology that helps air circulate, this set feels familiar while doing more temperature regulating than traditional covers can. Thread count ain't nothing but a number. You have been told that high thread count means high quality. But in reality, all those extra fibers—while soft—just trap more heat. We think your sheets need to be soft and breathable, so ours are both (and thanks to our Air Flow Certification, we can prove it).