how long can you use britax infant car seat Britax Willow™ S Infant Car Seat with Alpine Base

how long can you use britax infant car seat Britax Willow™ S Infant Car Seat with Alpine BaseRide with peace of mind with the Britax Willow S Infant Car Seat. This rear facing car seat is side impact tested and includes the Alpine travel car seat base for added convenience. First ride jitters? Gone. The Willow S is a rear facing car seat with ClickTight technology so you know it can be installed securely on the first ride and beyond. This 5 point harness car seat features a RightSize system that provides adjustment points at the hips,

Ride with peace of mind with the Britax Willow™ S Infant Car Seat. This rear facing car seat is side impact tested and includes the Alpine travel car seat base for added convenience. First ride jitters? Gone. The Willow™ S is a rear facing car seat with ClickTight® technology so you know it can be installed securely on the first ride and beyond. This 5 point harness car seat features a RightSize™ system that provides adjustment points at the hips, shoulders and between the legs to create your baby’s perfect fit from the start. When it's time to cruise, this baby car seat easily attaches to Britax Brook™, Brook™+ and Grove™ strollers in both parent-facing and forward-facing modes for convenient trips on the town. This seat features a washer and dryer-friendly SafeWash® car seat cover and inserts with naturally flame-retardant fabrics. The Alpine base is equipped with a ReboundReduce™ Stability Bar to help minimize movement for added peace of mind on the go. Whether you’re putting the seat into the car or connecting to a stroller, the Britax Willow™ S baby car seat makes transport a breeze.

• CLICKTIGHT® INDICATOR: Helps provide a visual guide while installing the base.* Indicator window may vary by model. Refer to user guide for specific instructions. 
• ROOM TO GROW: Willow™ S infant car seat, rear-facing only; 4 to 30 lbs
• LIGHTWEIGHT & EASY TO CARRY: Move this car seat and base from car to stroller in a snap
• WASHER AND DRYER-FRIENDLY: SafeWash® fabrics mean no more hand washing or waiting for the car seat cover and stroller insert to air-dry. Just quick and easy cleanup, so you can keep moving
• NATURALLY FLAME-RETARDANT FABRICS: This baby car seat features naturally flame-retardant fabrics that are safe to wash and dry
• INFANT INSERT PILLOW: This rear facing car seat is designed to provide a more comfortable and customized fit for newborns under 11 lbs
• SAFECELL® TECHNOLOGY: Designed to help manage energy and minimize force transferred to baby
• REBOUNDREDUCE™ STABILITY BAR: Alpine infant car seat base helps minimize movement in a crash; carry handle provides stability when used in the upright position
• PLUSH HARNESS PADDING: Travel car seat with an extra layer of cushioning helps prevent skin irritation and keep your child comfortable
• EASY FIND AND RECLINE: This car seat features level indicators and spring-assist recline that make it easy to find the correct installation angle for your vehicle
• SPACESAVER™ DESIGN: Slim outside, spacious inside; this infant car seat frees up backseat space while giving your child plenty of room for the ride

Specifications

• Product Dimensions: 28.1"L x 16.9"W x 24.11"H
• Child Weight: 4-30 lbs
• Rear-facing Harnessed Height: Less than 32"