The Evenflo LiteMax and Evenflo SafeMax infant car seats have updated weight and height requirements, noted below, to allow their use with small occupants:Weight: 3 – 35 lbs (1.4 – 15.8 kg)Height: 15.75 – 32 in (40 – 81 cm)Approval of your child’s healthcare providerThis update is a retroactive change to existing Evenflo LiteMax and SafeMax infant car seats. The following guidelines regarding the use of the infant insert must be applied:Date of manufacture 1/1/2018 or newer – infant insert is OPTIONAL for child fitDate of manufacture 12/31/2017 or older – infant insert is REQUIRED for infants who weigh between 3 – 4 lbs and OPTIONAL for infants who weigh over 4 lbs.The head pillow, harness covers and buckle pad are OPTIONAL for all Litemax seats, regardless of the date they were manufactured.As with any child using a child restraint, please ensure that all the other requirements set forth in the instruction manual for the child restraint are met.