Pad their cute little bums with ultra-soft fluff. Our daytime inserts are made of 4 layers of absorbent micro fibre, with a luxuriously soft layer of fleece on top. Nighttime inserts have 6 wonderful layers of micro fibre, for extra absorbency. Buttons cloth inserts snap into our one-size nappies covers. Plus, they come in 2 sizes for your growing baby (small fits babies 4.5-9.1kg., large fits babies 4.5-9.1kg.)! It really couldn't be simpler.