What is SPF? What It Means for Your Sun Protection

SPF, or Sun Protection Factor, plays a key role in protecting your skin from harmful ultraviolet (UV) rays. These rays are invisible but can cause long-term damage, ranging from premature ageing to serious skin concerns. If you’ve ever wondered what is SPF, read on to find out how it works and why it matters for your daily skincare routine.

What Does the SPF Number Mean in a Sunscreen?

Ever wondered what is the meaning of SPF in sunscreen? It’s the measure of how long a sunscreen will protect your skin from UVB rays, the chief cause of sunburn. Let’s look at the SPF scale:

• SPF 2 blocks 50% of UV rays: SPF 2 offers limited protection and is not ideal for most outdoor activities.

• SPF 4 blocks 75% of UV rays: With SPF 4, you're improving coverage slightly by blocking three-quarters of UV rays. 

• SPF 10 blocks 90% of UV rays: SPF 10 offers modest protection, but it's still inadequate for extended time outdoors.

• SPF 15 blocks 93% of UV rays: SPF 15 begins to offer more reliable defence, suitable for brief, incidental sun exposure.

• SPF 30 blocks 97% of UV rays: Wondering what is SPF 30? It’s often seen as the gold standard, offering a reliable shield without feeling too heavy.

• SPF 50 blocks 98% of UV rays: Offering higher protection, SPF 50 is ideal for prolonged outdoor exposure or for those with sun-sensitive skin.

• SPF 100 blocks 99% of UV rays: SPF 100 only offers 1% more protection than SPF 50. However, it may benefit individuals with extreme sun sensitivity or medical conditions.

Everything Related to UV Rays

Understanding SPF starts with knowing the two primary types of UV rays. Let’s take a closer look:

• UVA Rays

UVA rays penetrate deeply, reaching the dermis, the skin’s thickest layer. These rays accelerate skin ageing, causing wrinkles, loss of elasticity, and pigmentation. UVA rays can penetrate through clouds and glass, making daily protection crucial.

• UVB Rays

UVB rays mainly affect the skin’s surface, causing sunburn and direct DNA damage, both of which can increase the risk of skin cancer. SPF ratings specifically measure how well a product protects against UVB rays.

How Does SPF Work?

SPF essentially extends the time you can spend in the sun without burning. For example, if your skin normally begins to burn after 10 minutes in the sun, applying SPF 30 theoretically allows you to stay out 30 times longer without burning. However, remember that SPF does not mean you can stay in the sun for hours without protection. Even the highest number can wear off over time, through sweat, or from rubbing. 

SPF 30 vs SPF 50: Which One Do You Need?

When asking what SPF sunscreen is best among SPF 30 and SPF 50, follow this rule:

• SPF 30 is ideal for everyday wear, office commutes, or short periods spent outdoors. 

• SPF 50 is your go-to for prolonged sun exposure, such as beach days or outdoor sports.

Wondering about what is SPF 50 PA+++? The PA rating measures UVA protection, and PA+++ signifies high UVA defence.

How Much to Apply, How Long It Lasts and When to Reapply

Here’s the insider’s guide to mastering the art of application:

• Use a generous amount. We recommend a teaspoon-sized dollop for your face and a shot glass full for your body.

• Apply 15 to 30 minutes before sun exposure. This gives the sunscreen time to fully absorb and activate.

• Reapply every two hours or immediately after swimming, sweating, or towel drying.

• Don’t forget delicate areas. Remember spots like your ears, neck, and the tops of your feet.

Choosing the Right SPF for Different Skin Types

It is essential to find a sunscreen formulation that complements your skin’s specific needs. Here’s your guide:

• Oily Skin

Select a lightweight, oil-free sunscreen that controls shine and won't clog pores. CodeSkin’s UltraMatte Oil-Free Fluid Sunscreen offers high protection with a non-greasy finish.

• Dry Skin

Look for a hydrating sunscreen with ingredients like hyaluronic acid or glycerin to keep skin nourished. Our UltraLite Fluid Sunscreen blends moisture and protection in a smooth, gentle formula ideal for dry skin.

• Combination Skin

A balanced sunscreen that hydrates dry zones while controlling oil in the T-zone works best. Try our UltraMatte Oil-Free Fluid Sunscreen for such a versatile need.

• Sensitive Skin

Opt for a gentle, fragrance-free sunscreen that reduces the risk of irritation. Our UltraSensitive Mineral Sunscreen, powered by non-nano zinc oxide, offers safe, soothing protection for delicate skin.

Elevate Your Skincare with Smart SPF Choices

Understanding what SPF means and integrating the right sun protection into your daily routine is essential. CodeSkin’s scientifically advanced and ethically formulated sunscreens are made without over 1,600 ingredients restricted by leading global health authorities. So why wait? Explore our collection today!