I researched cold caps before I started chemo almost 3 years ago. My oncologist was dismissive and wouldn't discuss it. They've been used extensively in Europe for over 10 years, but here I think they're still experimental and most insurance won't cover. Perhaps that is changing. The cap is used before, during and after chemo to limit the drugs making their way to the scalp. I had a variety of wigs, but I lived in my ball cap that had hair attached. Easy to flip on, it was not hot like a wig.