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Castelli Mens Alpha RoS 2 Jacket
Castelli Mens Alpha RoS 2 Jacket
Castelli Mens Alpha RoS 2 Jacket
Castelli Mens Alpha RoS 2 Jacket
Castelli Mens Alpha RoS 2 Jacket
Castelli Mens Alpha RoS 2 Jacket
Castelli Mens Alpha RoS 2 Jacket
Castelli Men

Men's Alpha RoS 2 Jacket

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Your winters just got a whole lot warmer with a cycling jacket that's made to impress.

When the weather takes a turn for the worse, don't bother uncrumpling your ratty old jacket that barely keeps out the cold. Get incredible dry-weather breathability and comfort with an unbelievably high level of water protection with the Castelli Men's Alpha RoS 2 Jacket, and never settle for less.

A double-layer construction allows you to utilize the impressive outer wind-protection layer while keeping the insulation layer closed, allowing airflow inside the jacket to eradicate moisture while avoiding direct contact with the skin. On a long climb, a smart cyclist will completely open the outer layer to allow moisture to escape, and zip up that outer layer during a descent to remain completely dry inside. Water-resistant GORE-TEX INFINIUM™ WINDSTOPPER® fabric is utilized along critical seams around the shoulder to keep you dry through mist, wet roads, and even incessant light rain. Other seams are hidden out of direct water flow and, with the water-repellent treatment on the fabric, moisture is completely prevented from entering.

Featuring the brand new double-layer wrist opening, fit with an inner layer that goes under your glove to seal tight to your wrist, and an outer layer that goes over your glove so rain will roll down the outside of the glove — and not end up inside.

Prepare for your gear to get a cool new upgrade. Every detail in the Castelli Men's Alpha RoS 2 Jacket is designed to let you ride longer and in complete comfort throughout the cold-weather months — making this the ultimate winter jacket.


  • 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 rear pockets with reflective laser-cut drain holes
  • Zippered secure side pocket for valuables
  • Heavy-duty 525 grams
  • -5°C - 10°C (23°F - 50°F)

  • Free Exchanges: This product qualifies for free exchanges within the first 60 days after order. We'll cover the shipping both ways for US customers if you need a different size and/or color of this product. Returned product must be in new condition with all labels and packaging. Free exchanges apply only for product in stock or available for backorder.

    B-Stock - This product has one or more B-Stock units available. These units can be purchased at a discount (see option select). B-Stock units were returned from other customers and may have missing or damaged packaging materials. These units are otherwise as new. The full manufacturer warranty applies. Click Here for more information.


    Sleeve Type: Long Sleeve 

    Dark Gray - Small

    Mfg PartNum: B20502030-2 

    Dark Gray - Medium

    Mfg PartNum: B20502030-3 

    Dark Gray - Large

    Mfg PartNum: B20502030-4 

    Dark Gray - X-Large

    Mfg PartNum: B20502030-5 

    Dark Gray - 2X-Large

    Mfg PartNum: B20502030-6 

    Light Black - Small

    Mfg PartNum: B20502085-2 

    Light Black - Medium

    Mfg PartNum: B20502085-3 

    Light Black - Large

    Mfg PartNum: B20502085-4 

    Light Black - X-Large

    Mfg PartNum: B20502085-5 

    Light Black - 2X-Large

    Mfg PartNum: B20502085-6 

    Savile Blue - Small

    Mfg PartNum: B20502414-2 

    Savile Blue - Medium

    Mfg PartNum: B20502414-3 

    Savile Blue - Large

    Mfg PartNum: B20502414-4 

    Savile Blue - X-Large

    Mfg PartNum: B20502414-5 

    Savile Blue - 2X-Large

    Mfg PartNum: B20502414-6 

    Ordered by Most Relevant First
    5 stars
    4 stars
    3 stars
    2 stars
    1 stars
    Amazing piece of kit
    by Morten
    Cycling Enthusiast
    South Bend
    1 of 1 customers found this review helpful.

    Very versatile. I have been comfortable at 45F with a sleeveless base layer and in the mid 20s with long sleeved merino wool base, and have no doubt I would stay cosy at even lower temps. Also very comfortable and a more racy fit than most winter jacket which I like. Finally sleeves are nice and long, avoiding the dreaded gap (something is a problem with the Castelli Espresso that I got a couple of yrs back).

    Only "issue" is the color fiery red is close to orange - something that it is hard to tell from a website picture.

    Reviewed 1/3/2021
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