Skip Hop Moby Smart Sling 3 Stage Tub - BlueSkip Hops cheerful whale shaped Moby tub grows with baby through three stages and offers Smart Sling support. The sling locks into two ergonomic positions: higher for full body support and lower for seated support. Tub grows with baby through three stages: Stage 1: Newborn (0 3 months; up to 15 lbs); Stage 2: Infant (3 6 months; up to 20 lbs); Stage 3: Sitters (6+ months; up to 25 lbs). Mesh Smart Sling provides Comfort Edge support and locks into two