Bring your body into balance for a good night’s sleep with technology used by astronauts and Olympic athletes! Patented Ionx® sleepwear from Goodnighties® is infused with negative ions to wick moisture and balance the ill effects of positive ions in the environment. The result? Cool comfort and soothed muscles for a better, more restful sleep. Goodnighties® sleep pants are a natural solution for better sleep! 88% polyester/12% Lycra®. Machine wash (no fabric softeners). USA. Sleep pants have elastic waist and 30" inseam. S - XL. Eggplant.