The seams at the inner knees allow for easy movement. This trainer has front and back pockets, combined with a flap pocket at the lower leg. Mid waist,Shaped seam at the knees,Inset pockets at the front, reversed entry pockets at the back,Flap pocket at the lower leg- Velcro closure,Elasticated waist, drawcord inside Semi-compact, 1×1 poplin construction made of fine cotton yarns. Surface has been micro sanded to provide a soft paper touch handfeel. Poplin plain weave,Sanded finish: soft touch,100% Cotton,By buying cotton products from G-Star Raw, you're supporting more sustainable cotton farming.