Castelli Nano Flex 3G Arm Warmer

Elevate your cold-weather cycling with the Nano Flex 3G Armwarmer engineered for riders who face variable conditions yet refuse to compromise on comfort or performance.

Why youll appreciate it

• Crafted from Castellis proprietary Nano Flex fabric, which offers excellent insulation and breathability, while resisting light rain and damp conditions.

• G-bielled to deliver real-ride fit and comfort: flat-lock stitching and a single-seam construction reduce bulk and chafe under long rides.

• Features double-sided silicone grippers at the arm openings to keep the warmers securely in place no constant re-adjustment when youre focused on catching breaks.

• Lightweight and compact: approximately 97 g per pair makes these armwarmers easy to pack for early-mornings or changeable afternoons.

• Optimised for temperatures around 8 0C to 20 0C (46 0F 68 0F) perfect for early spring and autumn rides or when you want just a little extra coverage.

Ideal for riders who

• Face cool, damp mornings or decisive weather windows and want a reliable layer they can pull on or off easily.

• Value gear that fits seamlessly into their ride flow packable, effective and ready when the temperature drops.

• Prefer premium build quality and thoughtful design details rather than bulky substitutes.

What it means for your ride
With these armwarmers on, youll stay warmer through descents, feel more comfortable on chilled climb segments and maintain focus rather than fiddling with gear. Their light water-repellent finish means you can keep going through light drizzle without batting an eye.

Pro tip for use
Before your ride, slide them on with your jersey or base layer already in place the double-grip cuff keeps things stable. For best results, choose a size that fits snugly without restricting motion. Wash after use with a gentle detergent, avoid fabric softener and maintain the silicone grip's stickiness by keeping it clean and dry.