The Happiest Baby, Inc. SNOO Postmarket Surveillance Study

Inclusion Criteria:

Infant/caregiver dyads meeting the following inclusion criteria will be eligible for study enrollment:

* Respondent must identify as a primary caregiver of the infant.
* Purchase or rental of SNOO shipped to a U.S. residence during the defined enrollment period.
* Caregivers must be English speakers ages 18 or older residing in the United States.
* Infants must use SNOO during the intended use period (i.e., birth to 6 months).
* Infants must meet at least one of the following criteria for high risk for SUID:

  * Infant race: Black or African American; and/or American Indian or Alaskan Native
  * Maternal education: 12 years or less
  * Low birth weight: \<5 pounds 8 ounces (\<2500 grams)
  * Last menstrual cycle (LMP) or obstetrical estimate (OE) Gestational age at time of birth: \<37 weeks (preterm)
  * Maternal age at time of birth: \<25 years
  * Smoking status: Any self-reported maternal smoking during pregnancy

Exclusion Criteria:

* Not primary caregiver
* Does not speak English
* Is not a US resident
* Is not 18 years old or older
* Infant did not use SNOO during the intended use period (i.e., birth to 6 months).
* Infants does NOT meet at least one of the below risk criteria:

  * Infant race: Black or African American; and/or American Indian or Alaskan Native
  * Maternal education: 12 years or less
  * Low birth weight: \<5 pounds 8 ounces (\<2500 grams)
  * LMP or OE Gestational age at time of birth: \<37 weeks (preterm)
  * Maternal age at time of birth: \<25 years
  * Smoking status: Any self-reported maternal smoking during pregnancy