The Rudy Project Astral Sphere have become my new favorite sunglasses. I wear them when I ride my gravel bike, I wear them when I run… and I even wear them when the sun isn’t doing anything.
That last part is the real reason I love them: they’re clear enough to use year-round, but they also darken in the sun. For trail running and gravel biking—where you’re constantly going in and out of sunlight—that’s a big deal.
This review is based on how I actually use them: running, trail running, ultra running, and gravel biking.
Quick verdict
If you want one pair of sports sunglasses that works in forest shade, early morning/evening light, and bright sun—and you care about comfort, stability, and protection from wind/bugs/dust—the Astral Sphere is an excellent option.
The main downside: fogging can happen when you stop after running hard, and they fog fast if you wear a buff over your nose.
Specs (for the detail lovers)
- Model: Rudy Project Astral Sphere
- Lens: ImpactX 2 Red
- Filter range: F-1 → 3 (photochromic / light-adaptive)
If you want to nerd out on every spec, be my guest. I like to focus on how they feel in real life and if they stay on my nose or not.
1) Fit and comfort: my #1 priority
For me, the most important thing in sunglasses is comfort.
I don’t want:
- pressure on the sides of my head
- pain behind my ears
- sunglasses sliding down my nose mid-run
This pair is a perfect fit for me. They feel light and soft, and they don’t press against my ears or squeeze my head.
Adjustable nosepiece = stable while running
The nose is adjustable, so you can set the grip around your nose and make sure the glasses stay put. For running, that matters more than most people think. If sunglasses slip, you end up touching your face all the time, and that’s just annoying.
I can wear them on the gravel bike without any weird pressure points under my helmet.
2) Coverage and shape: no side light, more protection
The second most important thing for me is the shape and coverage.
I want sunglasses that shield my eyes from the sun—even when the sun comes from the side. The Astral Sphere are wide and wrap nicely around my face, so light doesn’t sneak in from the sides.
But it’s not only about sunlight.
The wraparound shape also helps with:
- wind
- flying dust/sand on gravel
- bugs (more on that in a second)
3) Photochromic performance: the real reason they’re great for trail + gravel
I run a lot on trails and ride a lot on gravel roads. Even on the road, you’re constantly in and out of sunlight, if you ride a lot in the forest, like I do. I don’t like it when I have to keep taking off my sunglasses and putting them back on again.
On the bike, you can sometimes stash sunglasses in your helmet. But when I run, my race vest is usually full. And if I hang sunglasses on my shirt… I tend to lose them. (I wish this wasn’t true. But it is. Just ask Sara.)
The ImpactX 2 Red lens adjusts with the sun
These Astral Spheres are photochromic. They darken in the sun and clear up when you’re back in the shade, and they adjust pretty fast.
For ultra running and gravel biking, that’s the difference between actually enjoying your run/ride and constantly managing your sunglasses like they’re a second job.
4) Year-round use: wind, mosquitoes, and “tiny fly hour”
My eyes tear a lot when it’s windy. And in the forest—especially early morning and evening—there are periods when it’s basically mosquitoes and tiny flies hour. Because these glasses stay clear when there’s no sun, I wear them even when it’s cloudy or dark outside.
In short, I use them year-round to:
- keep wind from turning my eyes into waterfalls
- keep bugs out of my eyes in warm weather
- keep dust/sand out of my eyes on gravel roads
This is the biggest reason I always pick them right now.
5) Fogging: the downside
So… is everything perfect? No.
Like all glasses, they can fog up when you’ve been running hard and then you stop for a moment—like when you’re choosing another podcast on your phone.
And there’s one specific case where they fog up fast: If you run with a buff over your nose, these glasses are probably not for you
If I pull a buff up over my nose, the warm air goes straight upward and the lenses fog. If that’s your winter setup, you’ll probably be annoyed. For me, this fogging isn’t unique to the Astral Sphere—it happens with my other glasses too—but it’s still something to know before you buy them.
6) Durability: I’m known for destroying glasses
I drop sunglasses. I step on them. I sit on them. It’s a talent.
So far… not a scratch. That’s genuinely surprising, and it’s a big win for me because durability is often the hidden cost of “nice” sunglasses.
To give you an idea of my clumsiness: One day I was in New Zealand to do a story on bungy jumping. As I broke my sunglasses the day before by putting my bag on them, I stopped at the petrol station to buy a new pair. Drove half an hour to the bungy jump, took out my photo camera, walked to the cliff to take a shot, put my sunglasses on the top of my head and the first thing I saw when looking down through the lens of my camera was my sunglasses falling down into the river. So yes, they lasted 35 minutes.
Disclosure (how I work with brands)
Rudy Project gave me these sunglasses to test. This is not a paid review, and everything in this post is my honest experience.
This is the relationship I like to have with brands: full editorial freedom, honest feedback, and sometimes brands actually use that feedback to improve products. For example: Mount-to-Coast told me they’re adjusting their R1, with a stronger outsole, after feedback from me and other gear testers. If you’re curious, you can find that review here.
If a brand doesn’t give me full freedom, I don’t review their products.
Final thoughts: would I recommend the Rudy Project Astral Sphere?
Yes.
I’ve got a couple of sunglasses laying around, but right now I always pick these if I go for a run or a ride.
They’re comfortable, stable, protective, and the photochromic lens makes them ridiculously practical for trail running and gravel riding.
That’s it. I don’t know what else to say about a pair of sunglasses.
Keep on Running
