# Booster seats that adjust as a child grows Which booster seats can be used as a child grows, based on age and weight limits? Evenflo Big Kid LX High Back Booster: The seat is a high\-back booster that converts to a no\-back booster when the child is ready\. Sources disagree: the store lists 40–110 lb or 40–57 inches tall, while Consumer Reports and the Safety Restraint Coalition list 30–110 lb for highback mode and 40–110 lb for backless mode\. Evenflo GoTime LX High Back Booster: It has two modes of forward\-facing use and converts from high back to no\-back booster It has 7 height positions adjustable with one hand Evenflo GoTime No\-Back Booster Car Seat: The store says the seat is for children at least 4 years old, 44–57 in tall, and 40–120 lb\. ### 1. [Evenflo Big Kid LX High Back Booster](/products/ucp/megababiesusa-com/7625423651070) (sold by megababiesusa\.com) Sources disagree: the store lists 40–110 lb or 40–57 inches tall, while Consumer Reports and the Safety Restraint Coalition list 30–110 lb for highback mode and 40–110 lb for backless mode\. - Growth modes: The seat is a high\-back booster that converts to a no\-back booster when the child is ready\. (listing) - Age and size limits: Sources disagree: the store lists 40–110 lb or 40–57 inches tall, while Consumer Reports and the Safety Restraint Coalition list 30–110 lb for highback mode and 40–110 lb for backless mode\. (guide) - Height adjustment: - ### 2. [Evenflo GoTime LX High Back Booster](/products/ucp/megababiesusa-com/7764651409662) (sold by megababiesusa\.com) It has two modes of forward\-facing use and converts from high back to no\-back booster - Growth modes: It has two modes of forward\-facing use and converts from high back to no\-back booster (listing) - Age and size limits: - - Height adjustment: It has 7 height positions adjustable with one hand (listing) ### 3. [Evenflo GoTime No\-Back Booster Car Seat](/products/ucp/megababiesusa-com/7764663763198) (sold by megababiesusa\.com) The store says the seat is for children at least 4 years old, 44–57 in tall, and 40–120 lb\. - Growth modes: - - Age and size limits: The store says the seat is for children at least 4 years old, 44–57 in tall, and 40–120 lb\. (listing) - Height adjustment: - 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 2026-10-25T16:34:27.385Z. 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. RoboTrunk's tools prepare a checkout at that store, then hand back a short-lived link. The person approves the total; once RoboTrunk has checked the store's total against it, the person is given the checkout link to tap in their own browser, or, if the person prefers and gives permission, their agent may open the link and finish there, and payment always happens on the store's own checkout page. RoboTrunk never takes the payment or sees a card. Where the rest of this site is: - /agent/story.md is what RoboTrunk is and how it works, in full. - /agent/tools.json is every tool, its arguments and its answers. - /agent/merchants is every store you can buy from through RoboTrunk. - /products/ucp is every store's indexed products. - /products/search is one search across every store, in plain words. - [What RoboTrunk is](/agent/story.md) - [Every tool, in your browser through WebMCP](/agent) - [The tools and how to call them](/agent/tools.json) - [The stores you can buy from](/agent/merchants) - [Every store's products](/products/ucp) - [Search every store at once](/products/search)