Easy does it. our Soma Intimates exclusive Cool Nights® rib knit pajama set makes it so easy to relax and get a great night's sleep. Dressed up with luxurious lace accents, the sporty silhouette is softened in a rib knit version of our Soma Intimates exclusive Cool Nights® fabric. It stays cool to the touch, so you can rest easy.DetailsCool Nights® fabric is made with lightweight rayon fibers that stay cool to the touch and keep the fabric from sticking to your body.V-neck.Sleeveless.Elasticized waist.4" inseam.93% rayon, 7% spandex. Machine wash. Imported.