I love these pajamas.  I won't  wear anything but bamboo viscose or bamboo rayon pjs because they are so soft and lightweight. Exceptional airflow. I like them even better than cotton pajamas.  The bsoft line is superior to other brands of so called bamboo pjs because they are 99% bamboo fiber.  Other brands have 70% bamboo and  25 % cotton and 5% spandex.  That blend still makes nice  pajamas but they don't feel as smooth or silky soft as the bsoft brand.  They feel almost as if I'm not wearing anything at all. I could go on and on but the best way to vefify my review is to try them for yourself. I know you won't be disappointed .