Summer riding has a problem that doesn't really get talked about until a dermatologist brings it up at your annual checkup: your forearms get hammered by UV for hours at a time, every ride, every season. Sunscreen wears off, washes off in sweat, and gets reapplied inconsistently. The Assos Summer Arm UV Protector P1 takes a more reliable approach, using a textile with permanent UPF 50+ protection built into the fabric itself so the coverage doesn't fade between bottle refills.

What separates these from a typical arm warmer is the textile choice and the intent behind it. The construction blends 89% polyamide, 8% polyester, and 3% elastane, which Assos has tuned for breathability and active cooling rather than insulation. Assos rates them Clima Code 1 of 3, positioning them squarely for warm, sunny conditions where the job is blocking UV — not adding warmth or wind resistance. If you're reaching for arm coverage in 85-degree heat, that distinction matters. These won't cook you the way a shoulder-season warmer would.

The fit follows Assos's usual second-skin philosophy. The low-volume construction has been adjusted to hug the arm without sagging down around the wrists, which is the failure mode of cheaper sun sleeves — they bunch at the elbow and slide as you ride. Lightweight and packable, they compress down into a jersey pocket if the sun drops behind a ridge or you finish in shade, so there's no penalty for tossing them on for a morning that might warm up faster than expected.... Read More