They are made from the same fabric all round with a vertical seam at the front and rear meaning no seams on the hips. The front is finished with a small metal buckle which allows a small degree of adjustment to the waist size. Because the fabric is a netting/mesh material, they are completely see-through and leave little to the imagination when worn! The waist and leg openings are elasticated to give a snug fit for both men and women. The gusset is a diamond shaped black cotton and the crotch is about 3 inches wide. They come in two sizes - 36/38 which is approximately UK size 8/10 and 40/42 which is approximately UK size 12/14. These briefs are from France and are made by C&A Lingerie.