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Britax Frontier 85 Harness-2-Booster Seat - SOLD OUT

The new Britax Frontier 85 Harness-2-Booster boasts best-in-class forward-facing five-point harnessed weight capacity up to 85 pounds with an industry-leading 20 inch shoulder harness height.

The seat also serves as a vehicle belt-positioning booster up to 120 pounds. Featuring True Side Impact Protection with one-hand adjustable harness height system, Versa-Tether and engineered energy management zones, the Frontier 85 is designed to be the safest high capacity seat in the industry.

Loaded with comfort and convenience features, such as comfort foam, integrated cup holders and fixed armrests, the Frontier 85 is the ideal seat for the child graduating from their convertible car seat without compromising safety.

  • True Side Impact Protection distributes crash forces, shields from vehicle intrusion, contains the head and body, and keeps the head, neck and spine “in true” or aligned, to limit injury
  • patented Versa-Tether introduces a staged-release tether webbing that anchors the top of the child seat at two points to minimize forward movement in a crash
  • energy absorbing base deforms in the event of a crash to absorb impact forces
  • energy-absorbing foam liner absorbs and distributes crash forces
  • Harness Ultra Guard System, HUGS, reduces forward head movement in the event of impact
  • compatible with SecureGuard which works with the vehicle safety belt in booster mode to prevent the child from sliding under the lap-belt portion of the safety belt during impact, thus minimizing the risk of abdominal injury - accessory sold separately
  • ergonomically designed to fit properly
  • soft, padded materials and supportive comfort foam promote proper seat use to enhance safety
  • highest 5-point harness seat capacity allows your child to remain harnessed up to 85 lbs or in booster mode to 120 lbs
  • tangle free, 5-point harness with 10 harness height positions (up to 20 inches) and three buckle positions for a snug and secure fit as your child grows
  • plush, premium cover set with thick, underlying comfort foam provides extra comfort, encouraging your child to stay in the proper position
  • armrests help provide a secure fit and a natural place to rest arms
  • easy to install and use correctly each and every time
  • quick-adjust head restraint & no-rethread harness easily adjust the harness shoulder height and head restraint without disassembling the harness
  • premium push-button lower LATCH connectors for a quick, simple, and tight installation
  • color-coded vehicle belt guides indicate the path and positioning of the vehicle seat belt
  • integrated cup holders are designed to fit common beverages such as 20 oz reusable water bottles
  • durable and washable cover in mature fashions for your growing child
Fit Chart:

Forward-Facing Harness
  • weight: 2 years and 25 lbs up to 85 lbs
  • height: 30 to 57 inches
  • seated shoulder height: 12 to 20 inches
Forward-Facing Booster
  • weight: 40 to 120 lbs
  • height: 42 to 65 inches tall
  • seated shoulder height: 13.5 to 24.5 inches
  • seat: 19.5 W x 23 H x 27 D inches
  • interior seat: 11.5 W x 24 H x 13.5 D inches
  • weight: 19.6 lbs

In stock and ready to ship, unless otherwise noted.
  • Shipping available to all 50 states
  • Sorry, this item cannot be shipped outside of the U.S.

Britax Frontier 85 Harness-2-Booster Seat

FREE SHIPPING on orders over $50! Use coupon code SPRINGBREAK50. Excludes sale items and freight on oversized items. Applies to standard ground shipping within the lower 48 states only.


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