Neck Flap vs Brim: Which Sun Hat Protects Kids Better?

A brim and a neck flap protect different parts of your child. A brim shades the face, eyes, nose and ears. A neck flap shades the back of the neck, which a short brim leaves exposed. For most kids, the best answer is a hat with both: a brim of about 3 inches all around, plus a flap or cape that stays in place when your child moves.

This guide explains what each feature covers, where each one falls short, how to pick by age and activity, and how to check the fit before you buy.

TL;DR

• A brim shades the face, eyes, ears and nose. A neck flap covers the back of the neck. Neither one replaces the other.
• HealthyChildren.org recommends a 3-inch brim all around. If the brim is shorter, a flap fills the gap at the neck.
• A hat alone is not enough. Pair it with shade, protective clothing, sunglasses and sunscreen where age allows.
• Fit decides everything. A hat that slips, flips up in wind or gets pulled off protects nothing.

Table of Contents

• What a brim does
• What a neck flap does
• Neck flap vs brim: side-by-side
• Does your child need both?
• Our Perspective
• How to check the fit before you buy
• Beyond the hat: what else to wear
• Where to start: BANZ sun hats
• Quick reference by activity
• Common mistakes
• FAQ
• Sources

What a brim does

A brim is the part of the hat that sticks out from the crown. It casts a shadow over the areas that get the most direct sun when the sun is high: the forehead, nose, cheeks, eyes and tops of the ears.

The CDC says the most effective sun-protective hats have a brim that extends all the way around, shading the face, ears and back of the neck. That is the key phrase: all the way around. A brim that is wide at the front and nearly absent at the back leaves the neck uncovered.

How wide should the brim be?

Two US sources give a consistent range:

• HealthyChildren.org, from the American Academy of Pediatrics, recommends a 3-inch brim all around to shield the face, ears and back of the neck.
• The American Cancer Society says a hat with a 2- or 3-inch brim all around is best for protecting the eyes, forehead, nose, scalp and ears.

So 3 inches is a good target. Measure it. Many hats sold as “wide brim” for children are closer to 2 inches at the sides and shorter at the back.

Where a brim falls short

• Short back brim. Kids spend a lot of time looking down: digging, building, reading, riding in a stroller or car seat. The sun hits the nape of the neck, and a front-heavy brim does nothing there.
• Wind. A wide brim acts like a sail. Without a chin strap it lifts, tips back or blows off.
• Reflected light. Sand, water and pavement bounce UV up under the brim. A brim shades from above, not from below.
• Stiffness. A brim that is too floppy folds down over a child’s eyes. One that is too stiff may bother them in a car seat or on a pillow-height surface, so the hat ends up in the bag instead of on the head.

What a neck flap does

A neck flap is a panel of fabric attached to the back of the hat. It hangs down over the nape and often the sides of the neck. Depending on the style, it is called a flap, a cape or a legionnaire back.

The neck is a spot parents often miss. It is easy to skip with sunscreen, hair covers part of it only sometimes, and it faces the sun whenever a child bends forward. A flap gives you fabric coverage there, with no product to apply or reapply.

The Australian radiation protection agency ARPANSA says legionnaire-style hats are effective for protecting the head, ears, face and neck when used with other protective measures. That is the neck flap’s main selling point: one piece covers four areas.

Where a neck flap falls short

• Often paired with a small front brim. Many flap hats are built like caps with a short peak. They protect the neck well and the cheeks and ears less well. Check the front and side coverage, not just the flap.
• Heat. A flap adds fabric around the neck. In hot, humid weather, look for lightweight, breathable material and a flap that can be flipped up or detached when your child needs relief.
• Gapping. A flap that is too short, or that bunches and rides up when your child looks up, leaves a strip of skin showing. Look for a flap that reaches well below the hairline at the back.
• Sides of the face. A flap hangs at the back and sides of the neck. It does not shade the cheeks and ears the way a full brim does.

Neck flap vs brim: side-by-side

The table points to the real answer: the two features cover each other’s gaps.

Does your child need both?

For most outdoor time, yes. ARPANSA says broad-brimmed, bucket and legionnaire-style hats are all effective, but that hats rarely give enough protection on their own and should be combined with other measures. The comparison is not really “which one wins” but “which gaps does this hat leave, and what covers them.”

Here is a simple way to decide.

Choose a full brim when

• Your child is mostly upright and moving: playground, soccer sideline, a walk.
• The weather is hot and you want maximum airflow.
• You will be in shade part of the time and want a light hat.

Choose a neck flap when

• Your child will be bent over a lot: sandcastles, tide pools, bugs, bike seats.
• You are on water, a beach or a boat, where the sun is strong and long.
• Wind is a problem and you want something that stays on.
• Your child dislikes a wide brim blocking their view.

Choose a hat with both when

• You want one hat that works for most days out.
• The day is long, such as a day at the beach, a hike, a ball tournament or a theme park.
• You do not want to think about the back of the neck.

Our UV protective legionnaire hat guide goes deeper on the flap style, and our sun hat safety guide covers UPF ratings and materials.

Our Perspective

BANZ started when an Australian family could not find proper protective gear for their own children, so they made it. That history shapes how we think about hats. A hat is only useful if your child keeps it on, so we design for easy fit and adjustability first, and sun coverage second only in the sense that coverage is worthless without the first.

We do not treat the brim and the flap as rivals. A brim handles the face and eyes. A flap handles the neck. The children’s flap hat from our Feel No Flare™ range is built around that idea, with UPF 50+ fabric and coverage past the ears and neck. We pair hats with See No Glare™ sunglasses because the eyes are the other part of the face that a hat alone does not fully protect.

We also hear from parents of children with sensory sensitivities. For them, a hat that feels itchy, tight or unstable gets thrown on the ground, whatever its rating. Soft fabric, a comfortable strap and a fit that does not need adjusting all day matter as much as the label.

— Shari M. Murphy

How to check the fit before you buy

Fit is the question most guides skip. A well-rated hat on a child who will not wear it is no protection at all. Run through these checks at home with the hat on your child.

1. Check the circumference. The hat should sit snugly above the eyebrows and ears without leaving a red line. Kids grow quickly, so an adjustable band or toggle gives you a season or two.
2. Do the shake test. Have your child shake their head and look up and down. The hat should stay put. If it tips back, the back brim or flap will not cover the neck.
3. Look at the brim from the side. The brim should stay level, not fold down over the eyes or flip up at the front.
4. Check the flap at the back. With your child looking down at their toes, the flap should still cover the nape. When they look up, it should not pull the hat forward over their eyes.
5. Test the strap. A chin strap that is easy to fasten and comfortable under the chin is worth it in wind or on a boat. Make sure it can be loosened and does not rub.
6. Check the sides. Look for gaps between the brim, flap and ears. These are the spots where sun gets in.
7. Try it for ten minutes. If your child is already pulling at it, the hat will come off outside.

For babies and toddlers, add one more check: your child should be able to lie back in a stroller or car seat without the flap bunching under their head.

Beyond the hat: what else to wear

A hat covers the head and part of the neck. It does not cover arms, legs, eyes or the lower face.

The CDC recommends combining sunscreen, a hat, shade, protective clothing and sunglasses. It also says broad-spectrum sunscreen should be SPF 15 or higher. The American Cancer Society adds that sunscreen is a filter, does not block all UV rays, and should be used along with other protective steps.

HealthyChildren.org points out that it can be easier to keep younger children covered than to count on getting the right amount of sunscreen on them, especially over long periods outside. That is a practical argument for clothing and hats: they work as soon as they are on, and they do not wash off in the water or rub off on a towel.

Babies under 6 months

The CDC says sunscreen is not recommended for babies 6 months old or younger, and that the FDA recommends keeping infants out of the sun during midday and using protective clothing if they must be in the sun. For a baby, a hat with a flap, loose long sleeves and shade are the main tools. Talk to your pediatrician about specific questions for your infant.

A simple outdoor kit

• A hat with a brim and neck coverage
• UV-blocking sunglasses sized for kids
• Lightweight, long-sleeve or UV swimwear for water time
• Shade: an umbrella, a pop-up tent or a tree
• Sunscreen for exposed skin on kids old enough to use it

Our outdoor sun safety gear examples lay out how these pieces work together for different activities.

Where to start: BANZ sun hats

If you want one hat that covers the brim and neck question, start with the children’s flap hat. Our Feel No Flare™ sun hats start from $19 and are made with UPF 50+ protection. You can also browse the full BANZ range, including See No Glare™ sunglasses from $17 and Feel No Flare™ UV swimwear from $15, to cover eyes and body as well as the head.

The free BANZ Protect app also shows real-time UV levels, which helps you decide when to add layers, find shade or head indoors.

Quick reference by activity

These are starting points. If your child’s face is covered but the neck is not, add a flap. If the neck is covered but the face and ears are not, add a brim or sunglasses.

Common mistakes

• Buying by style, not coverage. A cute hat with a 1-inch brim looks fine and covers little.
• Ignoring the sides. Gaps at the ears are easy to miss in the store.
• Skipping the strap. Without one, many hats do not last past the first gust.
• Treating the hat as the whole plan. It is one layer.
• Going too big. A hat bought to grow into slides over the eyes and leaves the neck open.
• Forgetting to replace it. If the hat is stretched, worn thin or too small, it no longer protects as designed.

FAQ

Is a neck flap better than a wide brim?

Neither is better across the board. A brim protects the face, eyes and ears, and a flap protects the neck. A hat with both covers the most skin, which is why we recommend that for long days outside.

What size brim is best for kids’ sun protection?

About 3 inches all around. HealthyChildren.org recommends 3 inches, and the American Cancer Society says 2 to 3 inches. Measure the back and sides, not just the front.

What is a cap with a neck flap called?

It is most often called a legionnaire hat or a flap hat. Some people call it a foreign legion cap. The style has a front peak and a fabric panel that hangs over the back and sides of the neck.

Can a hat replace sunscreen?

No. ARPANSA says hats rarely provide enough protection alone. Use shade, clothing and sunglasses, and sunscreen on exposed skin for children old enough to use it. For babies 6 months and younger, ask your pediatrician.

How do I keep a toddler’s hat on?

Choose a snug, adjustable fit and a soft chin strap that does not rub. Let your child wear it at home first, and wear matching hats yourself. A hat that is comfortable and not too hot is much more likely to stay on.

Sources

• Sun Safety Facts, CDC
• Sun Safety, CDC
• Sun protection using hats, ARPANSA
• What’s the best way to protect kids’ skin from sunburn? HealthyChildren.org
• How to Protect Yourself and Your Family From the Sun, American Cancer Society

Recommended

• Sun Hats for UV Protection: A Parent’s Safety Guide
• Wide Brim Hats and Face Protection: A Parent’s Guide
• UPF 50+: Swim or Sun Hat That Keeps Kids 98% of UV Out, Wet or Dry
• Best Sun Hats for Babies 2026: Top Picks