Tub grows with baby through three stages: 1: newborn (03 months), 2: infant (36 months) and 3: sitters (6+ months) Mesh Smart Sling provides ComfortEdge support and locks into two ergonomic positions. Upper position: offers headtotoe newborn cradling; Lower position: supports infants learning to sit Remove sling completely when baby sits upright Swivel hook for hanging on showerhead, shower bar or towel bar Nonslip interior texture Drain plug The sling locks into two ergonomic positions: higher for full-body support and lower for seated support. Dual layered mesh and comfort-edge construction securely cradles baby from head-to-toe. The slings adjusts to a cushioned seat that comfortably supports babies learning to sit. Remove the sling when baby has mastered sitting and easily bathe baby in the spacious tub-no uncomfortable plastic bumps.