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The First Years True Fit SI Convertible Car Seat - Black/Khaki

  • $219.99
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Product Description

The First Years launches a new convertible car seat, the True Fit SI which is easier to install, easier to use, safer for your baby. The SI has all the features of the original True Fit that make it so easy to use. The SI stands for Side Impact, and the new contoured head rest is designed for better head control. The contoured design helps in containing your child's head in the event of a crash. The harness is for use from 5 to 35 lbs rear facing and up to 65 lbs in forward facing installations. It is hassle free, the harness adjusts simply by moving the side adjusters and they are clearly labeled to help with the correct positioning. The C680 model features smaller bottom rails and the patented Rebound Energy Management system - a flip up rebound bar that actually helps manage the rebound in the unlikely event of a crash, pull the bar forward and it snaps in place with your rear facing installation and flip it back with you move to the forward facing installation.

The First Years True Fit SI Convertible Car Seat is fully lined with EPP foam and has deep side wings that really surround your child. The larger interior dimensions keep your child comfortable as they grow. Center angle indicator in the front of our seat for use when installing in the rear facing position. Easy to read indicator will help you determine if you have installed your seat correctly. For your infant, it will assist in achieving the recommended 45 degree angle for installation (without head rest) and as you keep it rear facing to 35lbs (with head rest) you can check for the recommended 35 degree installation angle. There are LATCH attachments mounted on the sides so they are easy to access when you are installing your seat and easy to secure when you remove the seat from your vehicle. Installation is stress free with our color coded lock offs, whether you are installing for the first time rear facing or forward facing.


  • The First Years True Fit SI Convertible Car Seat is side impact tested to international standards
  • Removable contoured head rest
  • Rebound Energy Management system and center angle indicator for rear facing installations
  • No rethread easy adjust harness
  • Two position recline and removable cup holder

Additional Info





5 lbs

65 lbs


Cup Holder(s),,




27.3 pounds

22.5 x 22.3 x 20.0

How to Get It

  • This item can be shipped to all 50 United States including Alaska & Hawaii
  • This item is NOT eligible for shipping to APO/FPO addresses, U.S. Territories, Puerto Rico or P.O. Boxes
  • Due to shipping restrictions, Ship Charges will be separate from other items in your order
  • This item may ship by itself

  • This item ships via Standard Shipping only

(learn more):

  • This item is sold online only (not sold in stores)
  • Orders placed for Store Pickup will receive online pricing and promotions
  • In-stock status is approximate and may not reflect recent sales
  • Not all items are carried at all stores. Please click the "Select a store" link to check product availability
This item may be shipped in the manufacturer's original packaging, which could reveal the contents of the box

Average Customer Rating:

by PowerReviews
The First Years True Fit SI Convertible Car Seat - Black/Khaki

(based on 1 review)

Ratings Distribution

  • 5 Stars



  • 4 Stars



  • 3 Stars



  • 2 Stars



  • 1 Stars



Reviewed by 1 customer

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Great Buy

By Happy Camper

from Newton, NH

About Me First Time Parent


  • Comfortable
  • Easy to Adjust
  • Easy to Clean
  • Easy to install
  • Safe
  • Sturdy
  • Stylish


  • Bulky
  • Heavy
  • Instructions Are Hard
  • Manuel Needs Work

Best Uses

  • Infants
  • Newborn
  • Toddlers

Comments about The First Years True Fit SI Convertible Car Seat - Black/Khaki:

My son has been using this product from birth to two years old so far. We use it everyday, its easy to use, all of the straps are easily tightened or loosened, takes about 2 mins or less to install in a different car. The product even looks awesome in our car, my son loves it! The pads all easily come off so its a breeze to clean. Once installed, especially with the rear impact bar set up it will not wiggle an inch. The seat is incredibly soft and cushy. However it is a little bulky, as I believe any convertible car seat will be and the directions are a little confusing.

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