Infinity - Black | Black Polarized Lens
SKU: SUN121
Colorways:
Size Guide
Size | Hat Size | Inches | CM |
---|---|---|---|
Small (S) | 6 ½ - 7 ⅛ | 20.5" - 22.4" | 52cm - 57cm |
Most Popular STANDARD (Std.) |
6 ⅞ - 7 ½ | 21.7" - 23.6" | 55cm - 60cm |
X-LARGE (XL) | 7 ⅛ - 7 ⅞ | 22.4" - 24.8" | 57cm - 63cm |
How to measure
To choose the right size, follow the steps below:
Use a measuring tape for maximum accuracy (flexible tape, if possible).
Make sure the measuring tape is positioned to where your hat will be wore and neither too tight nor loose.
Measure on bare skin / over hair similiar to how you would wear your hat.
Compare your head measurements to those on our size chart, and choose the size closest to yours.
-
Availability:In Stock
- Backordered, shipping soon




Infinity – Black Frame with Black Polarized Lens
Built for boldness. Designed to move.
Where performance meets edge, the Infinity sunglasses bring high-function energy with everyday style. With a flat-top shield silhouette and deep black-on-black finish, they’re made to stand out—on the track, heading to the gym, or out on the town.
-
Polarized lenses with UV 400 protection cut glare and deliver crisp clarity in any light
-
Featherlight, impact-resistant frame keeps things comfortable without slowing you down
-
Grippy, no-slip nose pads keep them secure no matter how hard you go
-
One-size-fits-most design built to suit a range of face shapes and active lifestyles
-
Matte black frame with matching black lens for a sharp, stealth-forward look
Clean lines. High performance. All confidence.
Your everyday flex just leveled up.
All orders received by 5:00pm ET are processed same-day, excluding Sundays and federal holidays. You'll receive a notification once your order has shipped, with a tracking number provided. We offer hassle-free returns and exchanges within 30 days of delivery. For any inquiries or assistance, please contact us atinfo@alteregorunning.com.