Three rows of snaps for adjusting the size as your baby grows. This will allow the nappy to fit most babies from about 3.6-16kg. An outer layer of laminated polyester knit keeps wetness in, and an inner layer of high quality suede cloth that wicks moisture away from baby's delicate skin, and provides a trim fit. Each nappy comes with one quality microfiber insert. Wash tips: For best results, wash every 1-2 days. Pre-wash with cold water and no detergent. Do a regular wash in hot water (60C/140F max) with detergent. Rinse warm twice. Tumble dry low. No bleach. No fabric softener.