Protect your skin without compromising performance with the Castelli UPF 50+ Arm Sleeves (Black). Designed for cyclists, triathletes, runners, and endurance athletes, these premium arm sleeves combine advanced sun protection, lightweight comfort, and moisture management to help you perform at your best in every outdoor condition. Whether you're tackling long summer rides, racing under intense sunlight, or training through changing weather, these sleeves provide professional-grade protection and all-day comfort.

Developed using Castelli's renowned Italian expertise in technical cycling apparel, the UPF 50+ Arm Sleeves are engineered to offer maximum UV protection while maintaining exceptional breathability and freedom of movement. Every detail has been carefully designed to meet the demands of serious athletes who require reliable performance during extended hours outdoors.

The sleeves feature UPF 50+ certified fabric, blocking more than 98% of harmful UVA and UVB rays. This advanced protection significantly reduces exposure to damaging sunlight, helping prevent sunburn, skin fatigue, and long-term UV-related skin damage. Instead of relying on sunscreen that can wear off during long rides, these sleeves provide consistent protection from start to finish.

Constructed from premium lightweight technical fabric, the sleeves offer outstanding stretch and flexibility. The four-way stretch material naturally follows every arm movement, allowing unrestricted mobility while climbing, sprinting, cornering, or maintaining an aerodynamic riding position. The fabric feels exceptionally soft against the skin while providing light compression that supports muscles without restricting blood circulation.

Excellent moisture management is one of the key performance benefits of the Castelli UPF 50+ Arm Sleeves. The advanced fabric quickly transfers sweat away from the skin and promotes rapid evaporation, helping regulate body temperature during intense rides. Even in high temperatures, continuous airflow through the breathable fabric keeps your arms cool, dry, and comfortable throughout the day.

The anatomical construction has been carefully shaped to follow the natural contours of the arm, ensuring a close, wrinkle-free fit that eliminates unnecessary bulk beneath short-sleeve cycling jerseys. The sleeves remain comfortably in position without limiting movement, making them ideal for endurance races and long training sessions.

Wide silicone-backed elastic grippers secure the sleeves at the upper arm without creating excessive pressure or discomfort. Unlike conventional arm warmers that may slide during activity, the Castelli sleeves remain firmly positioned throughout climbing, descending, sprinting, and repeated arm movement.

Flat-lock seam construction minimizes friction against the skin and significantly reduces the risk of irritation or chafing during prolonged use. Smooth seam placement enhances comfort over many hours in the saddle, making these sleeves suitable for Gran Fondos, Ironman events, ultra-distance cycling, and all-day adventures.

Beyond sun protection, the sleeves also provide a lightweight barrier against wind, insects, dust, road debris, and minor abrasions. During early morning starts or cooler descents, they offer just enough thermal protection without causing overheating once temperatures rise.

One of the biggest advantages of the Castelli UPF 50+ Arm Sleeves is their versatility. They can easily be removed, folded into a compact size, and stored in a jersey pocket whenever conditions change. Their lightweight construction makes them an essential accessory for rides where weather and temperatures vary throughout the day.

The classic Black colorway delivers timeless style while matching virtually every cycling kit. Whether paired with professional race jerseys, club apparel, or everyday training clothing, the sleek minimalist design complements any outfit while reflecting Castelli's premium Italian racing heritage.

Built with durable performance fabrics, the sleeves retain their elasticity, shape, compression, and UV protection through repeated washing and frequent use. Designed for athletes who train consistently, they provide season-after-season reliability without compromising comfort or performance.

Perfect for road cycling, gravel riding, mountain biking, triathlon, running, endurance racing, commuting, and outdoor fitness activities, the Castelli UPF 50+ Arm Sleeves are trusted by athletes worldwide who demand premium protection and uncompromising quality.