The Difference Between SPF 30 And SPF 50

What is SPF? 

With so many different sunscreens on the market, it can be hard to know which one to choose. One of the most confusing factors for many people when deciding on a sunscreen product is SPF or ‘sun protection factor’.


You’ll find sunscreen products and even makeups and moisturisers with SPF ratings of anywhere between 15 and 50 and higher (and we outline the value, or not, of SPFs above 50 further in the Blog). So, what do these figures mean? Here, we uncover the difference between sun protection factor ratings and help you to understand what they mean for you.

Sun Protection Factor

SPF stands for ‘sun protection factor’ and indicates the level of protection from the sun’s harmful UVB rays that a product offers. UVB rays are the ones that cause sunburn when you’ve spent too long in the sun.


Vanilla Green-Tea Fragrance-Free Mango Fragrance-Free Kids
SPF  50 30 30 30 30
For Face & Body 
Water & Sweat  resistant  80 min 80 min 80 min 80 min 80 min



Vanilla Green-Tea Fragrance-Free Mango Fragrance-Free
Sizes available  4oz &1oz 4oz &1oz 4oz &1oz 4oz & 1oz 4oz & 1oz

When it comes to the difference between SPF levels, SPF 30 and SPF 50 for example, this comes down to the percentage of the sun’s UVB rays that the product can block. A product with an SPF level of 15 will block around 93% of the sun’s UVB rays. You will often find SPF 15 in makeup and skin care products. However, in sunscreens, the industry standard is generally SPF 30 and above.

A sunscreen with SPF 30 will protect you from around 96.7% of UVB rays, whereas an SPF of 50 means protection from about 98% of UVB rays.

Anything beyond SPF 50 makes very little difference in terms of risk of sun damage, and no sunscreens offer 100% protection from UVB rays.

But what about UVA rays?

Of course, UVB rays aren’t the only thing you need to worry about when heading out in the sun. UVA rays are those which can cause wrinkling, premature ageing and skin damage. Whilst the SPF level of your sunscreen determines the level of protection you’ll receive from UVB rays, UVA protection is indicated by the term ‘broad protection’.


Protecting your skin from both UVA and UVB rays is important for skin safety and for preventing damage and premature aging, so it’s important to choose a sunscreen which not only has an SPF of at least 30 but is also a broad-spectrum sunscreen.

What’s the best sunscreen?

At the end of the day, the best sunscreen is the one you love to wear.

After all, if putting on sunscreen becomes a chore, or you’re finding your sunscreen irritating, you’re unlikely to use it effectively, and it won’t be providing you with adequate protection. Our best advice to you is to find a sunscreen that you love and that suits your needs, apply it properly, and use it whenever you head outdoors.

Read our Blog How to Apply Spray Sunscreen.

Our recommendations

At KINeSYS, we’ve dedicated years to developing sunscreens that not only protect from the sun’s harmful rays, but that people love to wear. That’s why we offer a range of sunscreens for different needs. From high-performance sunscreens for athletes, to oil-free and alcohol-free options for those with sensitive skin; we’ve got something for everyone.

High-performance Sunscreen

If you’re an athlete, or simply love to get outdoors for some sports on the weekends, you’ll need a sunscreen which is both sweat and water resistant, as well as being SPF 50. We’ve got a range of high-performance sunscreens which will keep you protected every time you head outside.

Top pick: Our high-performance SPF 50 Fragrance Free Spray Sunscreen is alcohol-free, SPF 50 for superior protection and is also fragrance free.

Sunscreen for Runners

At KINeSYS, we’re passionate about spreading the word about sun protection. That’s why we’ve partnered with several running groups throughout Australia, including Running Divas, Running Mums Australia and Galeforce Running. 

best sunscreen for runners

One of the reasons that many runners avoid wearing sunscreen is because it can leave an oily residue, which can drip into eyes and cause irritation. We recommend that runners use an oil-free sunscreen which is sweat and water resistant. 

Top pick: For superior sun protection without irritation, try our SPF 50 Fragrance Free Spray Sunscreen in handy 1oz pack. Easily fit it into your bum bag, backpack or pocket.

Sunscreen for Travellers

When travelling, it can be a struggle to keep your luggage to a minimum. That’s why we range several handy travel-sized sunscreens. These come in a range of options, including oil-free and alcohol-free spray packs.

Top pick: For the scent of summer, there’s nothing like mango. Try our SPF 30 Mango Spray Sunscreen in travel-size 1oz pack. Then, continue to use it all year round to bring back those vacation memories!  

Kids favorite Sunscreen

Getting kids to wear sunscreen when heading outdoors can be a nightmare! Wriggly bodies and often sensitive skin mean you need to find a sunscreen which his gentle and easy to apply. Our range of alcohol-free and oil-free sunscreens are kind to sensitive skin, won’t run into the eyes, and what’s more, come in fragrance-free options.

Top pick: Kids love our great fragrance-free range, and we’ve packaged it in bright orange, just for kids. Get the kids involved in your daily sun protection regimen by giving them their own special kid-friendly SPF 30 Fragrance Free Spray Sunscreen, in our travel-sized 1oz pack or standard 4oz pack.  

Water sport enthusiasts

Water sport enthusiasts are looking to find a sunscreen which not only offers protection for themselves, but also for our marine life. Our new zinc product hits the mark.

Top pick: All natural, oxybenzone-free, kind to sensitive skin and the environment, our new SPF 30 Clear Zinc is the first choice for those who enjoy spending time in the water. It offers broad-spectrum protection for you, and 100% natural ingredients to protect our marine wildlife and reefs.

No matter how you perform, we’ve got a sunscreen for you. Check out the full range on our website today.

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