Castelli's UPF Arm Sleeve has been proven to block 99.8% of damaging UV rays. This is thanks to the polyester base that is not only effective at blocking UV rays but also better at keeping you dry. This means that these sleeves are perfect in cooler and warmer conditions. The clean construction eliminates seams that can rub against your arm. These arm sleeves fold up to be very small so they can easily be kept in your pocket for when you need them.
- Double-sided silicone elastic
- UPF 50+ protection
- Solare fabric
- Breathable and lightweight