LAKE Poplin Pajama Pants in Americana Blue with Red Trim 100% Cotton Size small Excellent condition. This style features an elastic waistband and thoughtful details like a curved hem, piping, and ribbon tie. Made from 100% Cotton Poplin. Description The Poplin Pajama Pant in Americana, a barely-there blue finished with classic red piping, is ideal for chilly sleepers or those who crave more coverage. The pants feature an elastic waistband and thoughtful details like a curved hem, piping, and ribbon tie. Made of 100% cotton poplin.