Soft microfleece fabric. Elastic waistband with drawstring. Machine wash. MT31" - 34.5" 37" - 40.5" Tall 34" / XTall 36" 6' - 6'4". LT34.5" - 38.5" 40.5" - 43.5" Tall 34" / XTall 36" 6' - 6'4". XLT38.5" - 42.5" 43.5" - 46.5" Tall 34" / XTall 36" 6' - 6'4".