

Turns UV intored light
- 30%+ more red light
- UPF 50+
- Cooler in sun
Pick any two. Tap a Halo, then a size.
Men’s
Women’s
Use your normal performance-shirt size. Between sizes, size up for a relaxed fit.
30%+ more red light.Every Halo turns sunlight into red light while you wear it.
UPF 50+.Sun protection built into the fabric.
4°F+ cooler in sun.Measured against a comparable long sleeve.
Questions.
Can I mix men’s and women’s?
Yes. Any two Halo FS1s make a pair: any fit, any color, any size.
How does the pair price work?
Add any two and the price drops to $169 automatically in your cart. No code needed. A third Halo is full price; a fourth makes a second pair.
Is shipping free?
Yes. Orders of $169 or more ship free in the US and Canada, so every Halo Pair ships free.
How do I pick a size?
Use your normal performance-shirt size. If you’re between sizes, size up for a more relaxed fit.