When baby reaches 12 lb (5 kg). The SNOO Sleep Sack sizes are Small (5-12 lb / 2-5 kg), Medium (12-18 lb / 5-8 kg), Large (18-25 lb / 8-12 kg).
Move from the Small SNOO Sleep Sack to the Medium SNOO Sleep Sack.
Once the baby has greater motor control. Arm release is usually done at around 3-4 months of age.
Unsnap the sleep sack’s arm holes to allow one or both arms to be unswaddled.
When baby reaches 18 lb (8 kg). Large is 18-25 lb (8-12 kg).
Move from the Medium SNOO Sleep Sack to the Large SNOO Sleep Sack.
Do not start weaning until your little one reaches 5 to 5 and a half months. Before you turn Weaning mode on, your little one should be sleeping peacefully with both arms unswaddled from the SNOO sack.
In the Happiest Baby App, go to the Profile icon, then under SNOO Settings / Modes, toggle on Weaning.
Stop or do not use SNOO if the infant can push up on hands and knees, has reached 6 months of age, can roll over consistently (has demonstrated—on multiple occasions—the ability to roll from stomach to back during sleep), or when the child can sit, kneel, or pull his or her body up while in SNOO. Intended use is up to 25 lb.
Stop using SNOO and move your baby to a crib for sleep.