Rash Guards for Sun Protection (and Why Divers Actually Use Them)

Do you really need a rash guard for sun protection?

Yes—especially if you spend long hours in and around the water.

A rash guard with UPF 50+ blocks about 98% of harmful UV rays and doesn’t wear off like sunscreen.
For scuba divers, snorkelers, and swimmers, that makes it one of the most reliable ways to stay protected.

“I always wear a rash guard when diving in warm water—not because I’m cold, but because I’m in the sun for hours before and after the dive.”

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Why sunscreen isn’t enough (especially for divers)

Sunscreen sounds like the obvious solution—but in reality:

• It washes off during long dives
• You need to reapply it constantly
• It can irritate skin and eyes
• Some sunscreens are restricted in reef areas

👉 And let’s be honest: no one reapplies sunscreen between dives.

That’s why many divers rely on rash guards instead.

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What a rash guard actually protects you from

Rash guards are not just about sunburn.

They protect against:

• ☀️ UV radiation (even when you’re in the water or on the boat)
• 🐠 Jellyfish and stings
• 🪸 Coral scrapes and friction from gear
• 🎽 Chafing from BCD and wetsuit

Originally designed for surfers, rash guards are now widely used across water sports—including scuba diving.

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When to wear a rash guard (real diving scenarios)

Warm water diving (25–30°C)

In places like the Maldives or the Red Sea:

• Rash guard + leggings can be enough
• Ideal for long days on dive boats
• Maximum sun protection between dives

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Under a wetsuit

Even in cooler water:

• Makes it easier to get your wetsuit on and off
• Adds a light insulation layer
• Reduces chafing

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On the surface (this is where most sun exposure happens)

Most people underestimate this:

👉 You get more sun exposure on the boat and at the surface than underwater.

A long-sleeve rash guard protects your:

• shoulders
• back
• arms

—areas that are hardest to reapply sunscreen on.

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What makes a good rash guard for diving?

Not all rash guards are built for divers.

Look for:

• UPF 50+ protection
• Quick-drying fabric
• 4-way stretch for movement
• Long sleeves and full coverage
• Comfortable fit under gear

Mantaraj rash guards are designed with these needs in mind:

• UPF 50+ protection
• soft, stretchy materials
• durable for repeated saltwater use

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A simple rule

If you’re in the sun before or after your dive, you need protection.

And clothing beats sunscreen every time.

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Final takeaway

A rash guard isn’t just a nice extra—it’s one of the most practical pieces of gear you can bring on a dive trip.

• It protects your skin
• reduces your need for sunscreen
• and makes long days on the water more comfortable

Once you start using one, it’s hard to go back.

Tip: Read about Swim bras here: How to choose the best bra for scuba diving