The graphic design on these sleep pants is inspired by the Crystal Lake Police Department from Friday The 13th. The elastic waistband on these PJs conforms to your waist with perfection. The adjustable drawstring allows you to find the perfect fit. This set of Friday The 13th pajama pants consists of a cotton-blend fabric which provides breathability and comfort. If you’re a diehard Jason fan, then these Friday The 13th pajamas are the perfect addition to your sleepwear collection.