boxercraft Youth Flannel Pant The ultimate winner in year-round style and comfort. Features a covered elastic waistband, longer length, and roomy cut. Constructed from super-soft 4 oz 100% cotton flannel. Sized Youth YS-YL. Unisex Fit. Since this pant is made from 100% cotton it is not intended to be used for sleeping or activities related to sleeping. It does not comply with the CPSCs childrens sleepwear requirements - which call for 100% polyester.