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ALPHA RoS 2 JACKET

The top rated winter jacket, bringing warmth, breathability and a high level of rain protection along with a soft, comfortable fit. This jacket leads the way in demonstrating how a winter jacket should perform.

$389.99 $253.50 1 2 3 4 5  5  (6 reviews)

local_offer Promo 35%

Color: MILITARY GREEN/FIERY RED-SILVE

|

4520502-075

ALPHA RoS 2 JACKET

1 2 3 4 5  5  (6 reviews)
local_offer Promo 35%
$389.99 $253.50

Color: MILITARY GREEN/FIERY RED-SILVE

|

4520502-075

Product features

  • Rain or Shine engineering makes this our best jacket ever for dry conditions while also providing significant rain protection
  • GORE-TEX INFINIUM™ WINDSTOPPER® 150 fabric for wind protection with high breathability and effective rain protection
  • Reduced seaming with seam sealing on shoulders reduces chances for water to enter through stitching
  • Double-layer Alpha construction separates insulating layer from wind/water barrier to let you better regulate ventilation
  • Water-resistant YKK® Vislon® zipper slides easily for better regulation of airflow
  • Raw-edge waist with silicone gripper lies flat and seals out wind
  • Double-layer cuff integrates with glove to prevent cold wind or water from entering at wrist
  • Stretch fabrics with advanced patterning make for excellent close-to-body fit that still accommodates a wide range of body types
  • Back ventilation
  • 3 rear pockets with reflective laser-cut drain holes
  • Zippered secure side pocket for valuables
  • Rain or Shine engineering makes this our best jacket ever for dry conditions while also providing significant rain protection
  • GORE-TEX INFINIUM™ WINDSTOPPER® 150 fabric for wind protection with high breathability and effective rain protection
  • Reduced seaming with seam sealing on shoulders reduces chances for water to enter through stitching
  • Double-layer Alpha construction separates insulating layer from wind/water barrier to let you better regulate ventilation
  • Water-resistant YKK® Vislon® zipper slides easily for better regulation of airflow
  • Raw-edge waist with silicone gripper lies flat and seals out wind
  • Double-layer cuff integrates with glove to prevent cold wind or water from entering at wrist
  • Stretch fabrics with advanced patterning make for excellent close-to-body fit that still accommodates a wide range of body types
  • Back ventilation
  • 3 rear pockets with reflective laser-cut drain holes
  • Zippered secure side pocket for valuables

Technical Features

Insulation

Waterproofness

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Waterproofness tooltip 

Windproofness

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Windproofness tooltip 

Breathability

Lightness

  • Weight:525 g
  • Temperature:-5°C - 10°C / 23°F - 50°F
  • Fit:Performance
    info
    Fit tooltip

What It Is

The top rated winter jacket, bringing warmth, breathability and a high level of rain protection along with a soft, comfortable fit. his jacket leads the way in demonstrating how a winter jacket should perform.
GORE-TEX INFINIUM™ WINDSTOPPER®

Gore-Tex® garments provide total wind protection and maximum breathability. The windproof membrane keeps you from getting cold due to windchill, but the optimum breathability prevents overheating and moisture accumulation by allowing sweat to escape easily. Water repellency is ensured by the DWR treatment applied to the outer fabric.

RoS - Rain or Shine

We’ve engineered RoS as the no-compromise best clothing we know how to make for dry conditions, and then tried to make it as close to waterproof as possible without sacrificing breathability and ventilation.

Our Rosso Corsa label is only applied to the highest-level products we make. Every thread and fiber, every curve and contour is obsessed about. Rosso Corsa represents a categorical breakthrough in cycling innovation and the meticulous craftsmanship you expect from Castelli’s performance-enhancing apparel.

Cyclingnews.com says this jacket is "sets an all-new benchmark in what a winter cycling jacket can achieve" and it's exactly what we think the perfect winter jacket should be. We started with a list of things we didn't like about the current jackets and set out to solve them—and in the process made our best jacket ever. The first issue to resolve related to moisture management. Even the best of the currently available fabrics provide a good level of breathability but can't keep up with the sweat generated during high-intensity riding. So we invented a double-layer construction that allows you to open an outer wind-protection layer while keeping the insulation layer closed and thereby allowing airflow inside the jacket to evacuate moisture while avoiding direct contact with the skin. On a long climb we'll completely open the outer layer to allow moisture to escape, and when we start the descent we close the outer layer and are completely dry inside. It works so well that sometimes it feels like magic. New for this year is a softer, warmer 3D insulation-layer fabric that provides better warmth, moisture management and fit. Next we focused on the openings: neck, waist and, most of all, wrists. The neck comes up high and is shaped to move with you, whether you're standing or in an aero position being a January hero and attacking your mates. For the waist we've created a stretch layer with a silicone bead that lies flat and completely seals out wind without bunching or riding up. New for this year is a brand-new double-layer wrist opening with an inner layer to go under your glove that seals tight to your wrist, and an outer layer that goes over your glove so that any rain will roll down the outside of the glove and not end up inside. Of course, the ultimate jacket will also hold up well in wet conditions, so we used GORE-TEX INFINIUM™ WINDSTOPPER® fabric along with waterproof seam taping on critical seams around the shoulder. Other seams are hidden out of direct water flow, and the water-repellent treatment on the fabric is sufficient to prevent most moisture from entering. We call it "essentially waterproof," using our own subjective judgment to find a balance between water protection, breathability and comfort. It doesn't mean that no drop will ever come in, but we do longish rides in real rain and stay completely dry. All these features make it a favorite of our staff and most of our ambassadors, and the most versatile performance jacket for cold-weather training we've ever created.
Rewies

What our customers say about us.

5

1

2

3

4

5

6 reviews

The Best Winter Jacket Ever

20/12/2022

I have used this jacket for two cold, windy and damp New England winters already. Really shines below 40 degrees. Used in weather as cold as 16 degrees with only a jersey and long sleeve base layer. Lots of pockets (including a front zipper pocket) unlike other jackets out there. Fits like other Castelli garments (2 sizes larger than normal stuff). I am 5' 10", 163 lbs and wear an XL in this jacket (maybe they have adjusted the sizing in the past few years)

PaulyG

1

2

3

4

5

5

Best Cycling Jacket I've Owned

22/12/2022

I can wear this jacket at sub-20⁰F with nothing more than an under armor tee underneath and still be warm.

Nicholas

1

2

3

4

5

5

Outstanding Jacket

23/12/2022

This jacket is extremely well made and performs as described. I've ridden with it mostly in the mid 30s F up to high 40s F and felt very comfortable. The large vent in the back works well.

I rode today in 22F to 25F weather and it did a great job. I was really amazed at how well my chest felt in strong headwinds. I’m not good in cold weather but this jacket works so well, I’m actually not worried about the cold anymore.

Buy this jacket. Thank me later. :)

David

1

2

3

4

5

5

Toasty at 19°F

26/12/2022

It was 19°F with gusty winds @ 25mph. Winter storm Elliott 2022. My base layer was a long sleeve merino wool shirt. I stayed nice and toasty on a 2 hour ride which was a mix of road and trail. This jacket exceeded my expectations for warmth and comfort. It has so much potential with proper layering. Completely cut the wind and cold. I was so impressed I came home and bought their “Estremo” gloves. I hope they perform as well as this jacket did. I would ABSOLUTELY recommend this jacket. Road, Gravel, MTB, whatever. My only complaint is that the little zipper tab on the left side broke off on my first ride. Zipper still works, just no tab. But this jacket is so warm I can’t even drop a star because of the zipper thing.

Michael Duncan

1

2

3

4

5

5

Essential

18/12/2022

Supremely comfortable and technically brilliant jacket. I’ve worn it in 4C damp weather with only a very thin short sleeve base and it works flawlessly. I was not too hot even at high intensity but I was just warm enough when leaving the house before being “warmed up.” I also own a Perfetto long sleeve but I prefer the Alpha ROS now as I can skip the thicker Flanders base I usually wear with the Perfetto in winter. The Alpha also fits better. The sleeves are a little bit looser but the chest is still tight enough to avoid flapping. Highly recommended. For the record I am 190cm and 87kg and the XL Alpha ROS fits me perfectly.

Mark

1

2

3

4

5

5

Favolosa

04/01/2023

Favolosa

Luca

1

2

3

4

5

5

The Best Winter Jacket Ever

20/12/2022

I have used this jacket for two cold, windy and damp New England winters already. Really shines below 40 degrees. Used in weather as cold as 16 degrees with only a jersey and long sleeve base layer. Lots of pockets (including a front zipper pocket) unlike other jackets out there. Fits like other Castelli garments (2 sizes larger than normal stuff). I am 5' 10", 163 lbs and wear an XL in this jacket (maybe they have adjusted the sizing in the past few years)

PaulyG

1

2

3

4

5

5

Best Cycling Jacket I've Owned

22/12/2022

I can wear this jacket at sub-20⁰F with nothing more than an under armor tee underneath and still be warm.

Nicholas

1

2

3

4

5

5

Outstanding Jacket

23/12/2022

This jacket is extremely well made and performs as described. I've ridden with it mostly in the mid 30s F up to high 40s F and felt very comfortable. The large vent in the back works well.

I rode today in 22F to 25F weather and it did a great job. I was really amazed at how well my chest felt in strong headwinds. I’m not good in cold weather but this jacket works so well, I’m actually not worried about the cold anymore.

Buy this jacket. Thank me later. :)

David

1

2

3

4

5

5

Toasty at 19°F

26/12/2022

It was 19°F with gusty winds @ 25mph. Winter storm Elliott 2022. My base layer was a long sleeve merino wool shirt. I stayed nice and toasty on a 2 hour ride which was a mix of road and trail. This jacket exceeded my expectations for warmth and comfort. It has so much potential with proper layering. Completely cut the wind and cold. I was so impressed I came home and bought their “Estremo” gloves. I hope they perform as well as this jacket did. I would ABSOLUTELY recommend this jacket. Road, Gravel, MTB, whatever. My only complaint is that the little zipper tab on the left side broke off on my first ride. Zipper still works, just no tab. But this jacket is so warm I can’t even drop a star because of the zipper thing.

Michael Duncan

1

2

3

4

5

5

Essential

18/12/2022

Supremely comfortable and technically brilliant jacket. I’ve worn it in 4C damp weather with only a very thin short sleeve base and it works flawlessly. I was not too hot even at high intensity but I was just warm enough when leaving the house before being “warmed up.” I also own a Perfetto long sleeve but I prefer the Alpha ROS now as I can skip the thicker Flanders base I usually wear with the Perfetto in winter. The Alpha also fits better. The sleeves are a little bit looser but the chest is still tight enough to avoid flapping. Highly recommended. For the record I am 190cm and 87kg and the XL Alpha ROS fits me perfectly.

Mark

1

2

3

4

5

5

Favolosa

04/01/2023

Favolosa

Luca

1

2

3

4

5

5
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