# Age ranges covered by Britax car seats What age range do Britax car seats cover? Britax One4Life Slim ClickTight All\-in\-One Car Seat: Feed tags list age groups from 0\-3 months through Gradeschool Britax Galaxy360 Slim Rotating Convertible Car Seat: The feed tags list 0\-3 months, 3\-12 months, preschool and toddler age groups\. Britax Boulevard ClickTight Convertible Car Seat: The store feed tags the seat for ages 0–3 months, 3–12 months, preschool and toddler\. Britax Grow With You Harness\-2\-Booster Seat: Grows from toddler to big kid; forward\-facing harness, then belt\-positioning booster Britax Skyline 2\-Stage Belt\-Positioning Booster Car Seat: Tagged for toddler, preschool and gradeschool\. Britax B\-Safe Gen2 Infant Car Seat: The feed tags the seat for age groups 0–3 months and 3–12 months\. ### 1. [Britax One4Life Slim ClickTight All\-in\-One Car Seat](/products/ucp/goodbuygear-com/7388221767783) (sold by goodbuygear\.com) Feed tags list age groups from 0\-3 months through Gradeschool - Age range: Feed tags list age groups from 0\-3 months through Gradeschool (listing) - Weight range: Rear\-facing use is for children under 49 inches in height and 5\-50 pounds (listing) - Condition: - ### 2. [Britax Galaxy360 Slim Rotating Convertible Car Seat](/products/ucp/goodbuygear-com/7657786277991) (sold by goodbuygear\.com) The feed tags list 0\-3 months, 3\-12 months, preschool and toddler age groups\. - Age range: The feed tags list 0\-3 months, 3\-12 months, preschool and toddler age groups\. (listing) - Weight range: Used rear\-facing as an infant and toddler seat for 5\-50 lbs\. (listing) - Condition: Listed as open box\. (listing) ### 3. [Britax Boulevard ClickTight Convertible Car Seat](/products/ucp/goodbuygear-com/7730308481127) (sold by goodbuygear\.com) The store feed tags the seat for ages 0–3 months, 3–12 months, preschool and toddler\. - Age range: The store feed tags the seat for ages 0–3 months, 3–12 months, preschool and toddler\. (listing) - Weight range: The seat is described for rear\-facing use with babies weighing 5–40 lb and forward\-facing use with children weighing 20–65 lb\. (listing) - Condition: The store describes the seat as gently used\. (listing) ### 4. [Britax Grow With You Harness\-2\-Booster Seat](/products/ucp/goodbuygear-com/7306152640615) (sold by goodbuygear\.com) Grows from toddler to big kid; forward\-facing harness, then belt\-positioning booster - Age range: Grows from toddler to big kid; forward\-facing harness, then belt\-positioning booster (listing) - Weight range: Forward\-facing harness weight 25\-65 pounds, height 34\-49 inches (listing) - Condition: Open Box (listing) ### 5. [Britax Skyline 2\-Stage Belt\-Positioning Booster Car Seat](/products/ucp/goodbuygear-com/7471627731047) (sold by goodbuygear\.com) Tagged for toddler, preschool and gradeschool\. - Age range: Tagged for toddler, preschool and gradeschool\. (listing) - Weight range: Given as 40\-120 lbs and 63 inches tall; the text does not say whether 63 inches is the child's height or the seat's\. (listing) - Condition: Listed as open box\. (listing) ### 6. [Britax B\-Safe Gen2 Infant Car Seat](/products/ucp/goodbuygear-com/7637835415655) (sold by goodbuygear\.com) The feed tags the seat for age groups 0–3 months and 3–12 months\. - Age range: The feed tags the seat for age groups 0–3 months and 3–12 months\. (listing) - Weight range: The seat is described as designed for children weighing 4–35 pounds and under 32 inches tall\. (listing) - Condition: The listing marks it gently used\. (listing) Every value in the table is a fact RoboTrunk checked, linked to the page it came from\. A dash means no checked fact fills that cell\. Prices and stock change, so this page prints neither: each product name links to its RoboTrunk page, which shows them live\. Written 2026-10-22T00:01:16.110Z. This page is published by RoboTrunk, a store built for shopping agents. The store named on this page sells the product and ships it. RoboTrunk is not the seller and never holds the money. Buying works in one path. 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