I've been curious about it every year, but I've finally decided to buy one. As it was introduced several times on the Nitori Live TV show, it really does feel cool. On a hot day, I cooled down my room with the air conditioner and a fan, and it felt great with the N Cool Series pillowcase, sheets and cooling blanket. If it suddenly gets cold, you can turn it inside out and use it as a regular towel blanket, as it is made of pile fabric. The N Cool series is popular for its colors and patterns, so if you are interested in it, we recommend getting it as soon as possible, as the popular items sell out quickly.