From Thule, this infant sling features: A padded sling for your baby's lateral support and maximum stability (age 1-10 months). Only use this product with children who cannot sit unaided between the ages 1 - 10 months old, who weigh less than 22lb/10kg, and who are shorter than 29½ in/75cm Using secure hooks, the infant sling is quickly and safely installed or removed in seconds Only use this product with children who cannot sit unaided between the ages 1 - 10 months old, who weigh less than 22lb/10kg, and who are shorter than 29½ in/75cm Imported.