Keep your cool while you sleep-or when you're relaxing-in our exclusive cool nightsâ® blouson top. Designed to keep you comfy, this soft pajama top made from our exclusive cool nightsâ® fabric that stays cool to the touch. Mix and match this sleep tee with our coordinating cool nightsâ® pajama pants and sleep shorts for head-to-toe comfort that looks great, too. Details cool nightsâ® fabric is made with lightweight rayon fibers that stay cool to the touch and keep the fabric from sticking to your body. Long sleeve top boat neckline 25 cuffed, smocked wrists 89% rayon. 11% spandex. Machine wash cold.