The wings are one layer of polyester fleece, making them very slim fitting. These pads will be ideal for the smaller woman with extremely heavy flow as well as for the larger woman as ordinary pads. These pads measure 13.5" x 3". Ideal if you tend to bleed into the centre of the pad. If you tend to hit the edge of the pad, then consider the normal Mega Pads, as they have fabric and PUL right into the wings.