Castelli Armwarmers Nanoflex (Black)

$64.99
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It's tough to make arm warmers warmer. If we know we'll be riding in conditions where a pair of arm warmers won't keep us sufficiently warm, we tend to choose a thermal jacket.

But, what if the day turns out to be intermittently cold and wet? Well, the Castelli Nanoflex Arm Warmers are designed for days that deliver everything from cold and wet to sunny and dry. Nanoflex is a proprietary Castelli fabric. The mill begins with Castelli's super-warm and ultra-stretchy Thermoflex fabric, used in many of its winter pieces, and then coats the outside with tiny nanofilaments of silicone fiber.

These fibers create a near waterproof barrier to moisture, and raindrops run off the fabric without soaking through. Despite its water-resistant finish, Nanoflex fabric remains highly breathable, keeping you comfortable in almost any conditions. Silicone arm grippers keep the arm warmers in place on the hardest rides, and reflective logos are printed at the elbow and lower arm to increase your visibility to motorists in poor light conditions.

The Castelli Nanoflex Arm Warmers are available in four sizes from Small to X-Large and in the colors Black, Red, and White.

Please note that Castelli recommends using these warmers at temperatures ranging between 50 and 60 degrees Fahrenheit.
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About Castelli

Castelli Cycling traces its roots back to 1876, as a tailor in Milan clothing organisations such as AC Milan, Juventus and the Milan Ballet. Castelli has a long history of high profile clients in cycling, and can be credited with introducing the first aerodynamic Lycra shorts worn by riders. Other technologies which are now common place in cycling apparel such as windproof garments, thermal clothing and sublimated prints were also pioneered by Castelli. Castelli continues to be at the forefront of high performance cycling apparel, with its garments being worn to victory by the world's top riders in events such as Paris-Roubaix and Giro d'Italia.

Check out our full range of Castelli Cycling Clothing here

Club 99 Membership

Join Club 99 for just $5 when you make a purchase in store, or use the button below to buy membership online. To reward you for being a club member, your Club 99 membership card will give you these great benefits:

  • Discounted Club 99 pricing, in store and online
  • A $25 gift card when you spend over $500 in a year *
  • Access to free bike maintenance classes
  • Exclusive priority access to new offers
  • Access to exclusive guarantees

Please note that when you buy Club 99 membership online, it may take up to 20 minutes to receive your welcome email.

* Click here for Club 99 terms and conditions.

Castelli Arm & Leg Warmer Sizing Chart

Size Short/Jersey Size Approximate Weight
Small (Womens) Extra Small-Small 45-61kg
Small (Mens) Small-Medium 45-61kg
Medium Small-Medium 61-70kg
Large Large- Extra Large 70kg-79kg
Extra Large 2XL-3XL >80kg
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