Getting it right: harnesses

A correctly fitted harness is one of the most important parts of car seat safety.

It’s what holds your child in place, manages crash forces, and works with the seat to protect them.

And small details - like tightness, positioning, and flat straps - make a big difference.

Why harness fit matters

In a crash, the harness is designed to:

• Keep your child securely in the seat

• Spread forces across the strongest parts of the body

• Limit movement

If the harness is too loose, twisted, or poorly positioned, it can’t do this effectively.

How tight should the harness be?

The harness should be snug against your child’s body.

A good way to check this is at the collarbone:

• The harness should sit firmly against the collarbone

• There shouldn’t be any visible slack

• You shouldn’t be able to pull it away from the chest

The Pinch Test

The pinch test is a quick and reliable way to check harness tightness.

Try to pinch the harness at your child’s shoulder:

• If you can’t pinch any material → the harness is tight enough

• If you can pinch a fold → it’s too loose

This should be done at the shoulder/collarbone area, not lower down.

Harness position: close to the neck

The harness straps should sit close to your child’s neck, not slipping off towards the shoulders.

This helps to:

• Keep the harness in the correct position

• Prevent movement during a crash

• Ensure forces are managed properly

It might look close, but this is exactly where it should be.

Flat straps matter

Harness straps should always be:

• Flat

• Untwisted

• Smooth against the body

Twists can:

• Reduce the surface area of the harness

• Concentrate crash forces into a smaller area causing injuries

• Affect how the harness performs

A quick check each time you buckle up makes a big difference. YouTube search ‘The Triangle Method’ for a visual on how to remove twists.

Shoulder pads - are they important?

Yes - if your seat comes with them, they should be used.

Shoulder pads are designed to:

• Help spread crash forces

• Improve comfort

• Keep the harness positioned correctly

They’re safety-tested as part of the seat, so removing them can affect performance.

Crotch pads - do they matter?

Crotch pads (the padded section around the buckle) also play a role.

They help to:

• Position the buckle correctly

• Improve comfort

• Reduce pressure in a crash

As with shoulder pads, they should be used if they’re included with your seat.

Common things to watch for

Even with the best intentions, these are easy to miss:

• Harness looks tight but fails the pinch test

• Straps sitting too wide on the shoulders

• Twists hidden near the hips or buckle

• Pads removed “for comfort”

• Bulky clothing creating hidden slack

A quick check before each journey can catch all of these.

FAQs

My child complains the harness is too tight - what should I do?

A properly tightened harness can feel snug, especially if they’re used to it being looser. Focus on correct fit and comfort through appropriate and safe clothing, not loosening the harness.

Can I remove the pads if my child doesn’t like them?

If they came with the seat, they should be used unless the manual specifically says otherwise.

Do I need to check the harness every journey?

Yes - it only takes a few seconds, and it ensures the seat is doing its job properly every time.