The Cooling Pajama Convertible Sleeve Shirt is a hot sleeper's dream come true. Made from a specialty brrr° Pro fabric that offers immediate, continuous chill technology, this adjustable sleeve top includes a cooling, wicking, and drying performance trifecta. That means, in the middle of the night, when warmth arises, it gets to work removing sweat and refreshing the body. And, better yet, this shirt can be mixed and matched with other Cooling Pajama separates to make the perfect set.