Skip Hop's Moby tub can be used with newborns. infants or toddlers thanks to the comfortable mesh sling insert. The sling locks in two ergonomic positions, one to cradle newborns and the other to help support babies learning to sit on their own. It attaches with two clips and two buckles, and is removed once your baby is ready to sit upright, around six months. The tub has a non-slip texture inside and a swivel hook behind the whale's tail for hanging.