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Code: CS1750285
Castelli Alpha ROS Cycling Jacket - AW18

The Castelli Alpha ROS jacket provides insulation from the cold while preventing you from over-heating thanks to its excellent breathability. This versatile jacket will keep you warm in cold weather as well as keeping you dry thanks to its effective waterproof outer and sealed seams on the shoulders with double stitching to stop water creeping in on longer rides. With a clever ‘Alpha construction’ Castelli have been able to produce a cycling jacket with two separate layers built in – one providing protection from wind and rain and the other providing insulation from the cold. 



  • Windstopper outer – for breathable protection from wind and rain
  • Sealed seams on shoulders
  • Separate insulating layer
  • Partially covered YKK zipper
  • Raw edge waist lies flat and moves with you
  • Raw edge wrist cuffs – prevents interference with gloves
  • Stretch fabric for close fit
  • Ventilation on back
  • Castelli text gripper at waist keeps jacket in place
  • 3 rear pockets with drain holes
Excellent bit of kit to have - warm and great in the wind and rain
Great piece of kit and well worth the investment. Sizing is unusually generous for Castelli and the XXL fits me like a glove, I'm 6'3" and 93kg. Sleeve length is perfect. Rode yesterday in temps down to 1 degree and didn't feel cold once, not even on long descents, and I only wore an L/S merino base layer. On the climbs opening the zip slightly meant I wasn't over heating either. It rained at the end of the ride and the jacket just repelled it. Best jacket ever!
Great Jacket! Have worn this in several wet cold days now, and very impressed. Have been in heavy rain for 40 mins, followed by light rain for another hour plus, and despite less than 10 degrees Celsius, have continued riding in comfort for another 2 hours with still totally warm torso and arms. Particularly like the tight fitting cuffs and waist, that keep the weather out. Snug fit for slim builds. I am 65kg, 170cm and medium fits nice. Also, after being out in rain for some time, the jacket dries quickly in mild warm room overnight, so fully dry to back up and use next day Only knock is limited colour range - brighter hi viz colour would have made a better choice than the blue, that is not ideal on cold grey wet days. Well worth the money for very warm jacket that copes extremely well in the wet..
I'm 6'03" tall and weigh 172lb. XXL is good fitting. This jacket has many good things, good quality and I get a good price
Great Cycling Jacket Probably the greatest jacket I have ever owned, keeps my core at a comfortable temperature even when riding below zero just use a baselayer and you are ready to go! Size fits small like all Castelli products.
Very good jacket for winter. High breath-ability, tight fit. Only one base layer needed, even with less than 5 degrees.
Excellent piece of kit, 100% windproof, highly water resistant and warm. Rode it with merino long sleeve base this week in 2 degrees with 15-25mph winds and continual rain. Proper grim day, but thankful for this jacket. In reality the waterproof was not quite there but we were out for almost three hours (WHY?)........ also worn on dry days down to 1 or 2 degrees and it is fantastic. I bought on recommendation and delighted to pass on. Only wish the Orange was not sold out as that's the winter option right there. If you have the dollar .....
Good fit and warm, sleeves are a bit long
Ordered this jacket for winter riding and it certainly lives up to my expectations. Used on ride in sub zero temperatures and wind, with only a long sleeve base layer. Absolutely superb, a bit on the pricey side but well worth the money.