Summer sun is here — and while beach days and backyard hangs are on the rise, so is the importance of smart, everyday sun protection. At TRNR Skin, we’re passionate about skincare that actually works, and when it comes to SPF, we’ve got the answers you need to keep your skin glowing (and safe) all season long.

SPF: Why It Matters

Let’s start with the basics. No matter the season or the weather, SPF is a non-negotiable. UV rays don’t take a break — and neither should your sunscreen routine. Here’s why:

• SPF 30 blocks about 97% of UV rays, while SPF 50 blocks 98%.

• Anything above SPF 50? Mostly marketing. SPF 100 doesn’t block 100% of rays — only hiding indoors can do that.

• Reapplication is key: You need to apply SPF every two hours for it to remain effective.

Mineral vs. Chemical Sunscreen: What’s the Difference?

Both protect your skin — but they work differently:

• Chemical SPF absorbs into your skin and transforms UV rays into heat, which is then released from your body.

• Mineral SPF sits on top of your skin, creating a physical barrier that reflects UV rays away.

Which Should You Use?

It depends on your lifestyle and skin type:

• Chemical sunscreen is a great pick for active days — many formulas are water-resistant and lightweight.

• Mineral sunscreen is ideal for sensitive or acne-prone skin — it’s gentle and less likely to clog pores.

The best sunscreen? The one you’ll actually use every day. Keep it visible, make it part of your routine, and don’t forget to reapply.

Stay Skin-Smart This Summer

Need help picking your perfect SPF? Explore our TRNR-approved recs for mineral or chemical sunscreen picks.