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Code: CS16577010
Castelli NanoFlex+ Armwarmers - AW18


The Castelli NanoFlex armwarmers have been part of their collection for 7 years now and during that time have become recognised by those in the know as the very best in protection from the elements. This latest version sees a new additional fabric – Nano Light added to the back of the elbow to help with ease of movement and enhance the fit and comfort while keeping water protection as high as ever. 



  • Fleece lined to keep arms warm
  • Highly breathable
  • Fast drying
  • Improved UV protection
  • Great in any cool, wet condition
  • Repels water droplets from rain and road spray
Tom Great performing arm warmer. I'm 5"7, 66kg and purchased the Medium. Fits snug and comfortably.
GC Great product. I've tried a few other brands in the past but these feel the best and hold their shape well. They don't feel too bulky, tight or restrictive. Great weather protection down to 0°C.
Mr Smith Great fit . I bought the large and OK for me . I am 5ft 9 and around 11st 7lb.
PJS I like the wind protection and the ability to repel mist. I bought a size smaller, I like a tight fit.
Mr Fogel Absolutely love them. Very soft inside and extremely warm.
baiu I'm 180 cm, L fits ok to me, snug but comfortable. I've got normal arms, not too skinny , if you have big arms it's going to be very tight.
Recep AKSOY Castelli does a pretty good job in cycling. Good quality with Castelli quality and reasonable prices from Merlin Cycles. A standard "s" body. I'm a 65kg 170cm tall man. I ordered a "S" size. Good quality fabric. Water-repellent outer fabric. I tested it under the fountain :). It doesn't bother in hot weather. A product that can be used not only in cycling but also in daily life. Merlin Cycles to send thank them for 5 days in Turkey. If you order your products from entering the country after Turkey sent with PTT. Your products are delivered late due to PTT density. You can take PTT KDTM yourself to be fast.
Mr CANDAMO Excellent product for the cold and rainy days
Mr Simpson Really happy with these - using them for winter riding with a Gabba and they work beautifully. I do start out a little cold - as a winter set up this is for hard riding rather than a leisurely cruise - although I'm sure they'd be good for that for 3 seasons. Excellent delivery etc from Merlin - and cheap too
Mr Williams Among the best arm warmers out there, brilliant wind proofing and surprisingly good at repelling water
James Simple, warm and highly effective.
Geoff Nano flex is not entirely waterproof but in combination with the slight brushed interior means these are ideal in all but winter down-pours. I have a pair of leg warmers in the same material and they span the gap between longs and shorts in terms of weather conditions.
Lavren Runs really small. I'm 5'7" 130lbs and M is pretty tight, I'd probably go with L if I knew they run that small, but I don't want to deal with the hassle of returning them.
Mr Tesmer Purchased the size large that has a very comfortable fit. Perfect on a cool windy day with moisture in the air.
Mr Cross These are much better than the previous version and worth the extra cost. They're far more comfortable around the elbow and the logos are more subtle. Highly recommend these.