Ladies or Unisex BEACH  PJ Pants. Adult Sizes. See Sizing dimentions in last picture. 
Unisex:
4.3 oz./yd², 100% double-brushed cotton flannel
Regular fit                                                                                       
Functional button fly
Self-elastic folded waistband with an inner drawcord
Inner side seam pockets
Woven loop label
Ladies:
4.3 oz./yd², 100% double-brushed cotton flannelRelaxed fit Self-elastic folded waistband with twill drawcordSide seam pocketsWoven loop label.
Ladies has the drawstring tie on the outside, Unisex has the drawstring on the inside.