Happy Heinys use only custom milled fleece for their diapers. There are no leg casings, which make better fitting diapers and contain messes better without leaving red marks on your baby’s legs.Should the fleece roll out? Yes! Do NOT try to roll the fleece in. The diapers will wick if the fleece is rolled in. They are designed so the only thing that touches your child's delicate skin is the soft fleece. Happy Heinys® are available in a variety of solid colors and fun prints. Happy Heinys® solids have been tested for 12 hours or more at night with absolutely no wicking for most babies. The solids have a 100% poly laminated outer layer and will work better overnight. Happy Heinys® Prints have a laminated 100% cotton outer layer and work best for daytime use. They may wick if used overnight for heavy wetters. Our prints are rotated frequently to keep the selection fresh so if you see something you like buy now or we might run out of stock.