Harmony Defender 360° MAX 3-in-1 Deluxe vs Safety 1st Boost-and-Go
Side-by-side specs from each maker.
Only the differences are shown.
| Harmony Defender 360° MAX 3-in-1 Deluxe | Safety 1st Boost-and-Go | |
|---|---|---|
| Type | Harness-to-booster | Harness-to-booster |
| Forward-facing weight | 26.5–65 lb | 30–65 lb |
| Forward-facing height | 27–57 in | 34–49 in |
| Booster weight | 40–120 lb | 40–100 lb |
| Booster height | 34–57 in | 43–57 in |
| Seat weight | 18 lb | Not listed |
| Head rule | Harness mode: Child's ears MUST BE BELOW top of the headrest. | The tops of your child's ears MUST be below the top of the car seat's headrest. (booster: not to be used if the child's ears are above the top of the booster seat's headrest) |
| Newborn insert | Infant insert cushion: 'Harmony recommends that you use the infant insert cushion until your child has reached a minimum of 35 pounds (15.8 kg).' | Not listed |
| Installation | LATCH (harness mode, not over 50 lbs), vehicle lap-and-shoulder belt, vehicle lap-only belt (harness mode), top tether (harness mode) | LATCH (lower anchor belt) forward-facing + top tether, seat belt (lap belt) forward-facing + top tether, seat belt (lap/shoulder) forward-facing + top tether, booster: vehicle lap/shoulder belt |
| Load leg | No | No |
| Anti-rebound bar | No | No |
| Rotates | No | No |
| Harness heights | 9 | Not listed |
| Aircraft label | Certified for aircraft, per the maker | Certified for aircraft, per the maker |
| Expires after | 10 years | 10 years |
Harmony Defender 360° MAX 3-in-1 Deluxe
- Manual lists harness use 22 - 65 pounds and booster use 40 - 120 pounds
- Manual lists aircraft certification with the harness
- Manual lists a one-hand headrest button
- Manual says forward-facing only; no rear-facing limits
Ask the meadow
Defender 360° MAX 3-in-1 Deluxe or Boost-and-Go?
Answers come from each maker's published specs. Safety and health questions link to the agency or medical source.
Which one will my child use longer, the Defender 360° MAX 3-in-1 Deluxe or the Boost-and-Go?
The Harmony Defender 360° MAX 3-in-1 Deluxe: it goes forward-facing with a harness, then booster, up to 120 lb. The Boost-and-Go goes forward-facing with a harness, then booster, up to 100 lb. The Defender 360° MAX 3-in-1 Deluxe expires after 10 years.
Which is easier to travel with?
Defender 360° MAX 3-in-1 Deluxe: certified for planes, 18 lb. Boost-and-Go: certified for planes.
Still wondering? Write to us at hello@cribpicks.com and we'll look it up.