The Apple Cheeks washable swim diaper has two layers of 100% polyester Canadian-milled mesh that allows water to comfortably move through the diaper while keeping any solids, should they occur at an inopportune time, out of the water. In good used condition with light wear that doesn't impede use, see last two pictures for details. Size 2 fits approximately 18 – 35lbs Let me know if you have any questions!