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Castelli Alpha RoS Jacket

Castelli Alpha RoS Jacket
  • Color: Light Black/Black
  • Color: Light Black/Black
  • Color: Matador Red/Black
  • Color: Matador Red/Black
  • Color: Orange/Black
  • Color: Orange/Black
  • Color: Red/Black
  • Color: Red/Black
  • Color: Silver Gray/Black
  • Color: Silver Gray/Black
Please select options


When we came out with the original Alpha Jacket, we wrote, Throw out everything you think you know about cycling jackets. We’ve done it once again. So throw out everything you think you know about cycling jackets.

We started by keeping everything that made the original Alpha Jacket your favorite dry-weather jacket: the two-layer construction to separate the insulation layer from the outer shell, the double front opening to diffuse the cold air when you open up to ventilate, the excellent breathability, the flat wrist and waist openings, the articulated collar, the insanely soft stretch fabrics, and the great fit.

By using Gore’s new Windstopper light rain-resistant membrane and DWR treatment, selective seam sealing, careful seam placement and construction, and a waterproof YKK Vislon zipper, we’ve made the jacket essentially waterproof while not compromising the characteristics that made it such a great dry-weather jacket.

It’s a significant step toward Castelli’s goal of making clothing that performs impeccably in the dry but offers complete water protection in the rain. And it will make your riding enjoyable, rain or shine.

- Rain or Shine engineering provides insulation and breathability for cold and dry rides, with effective waterproofing for wet rides
- Gore Windstopper 150 fabric provides wind protection with high breathability and effective rain protection
- Seam sealing on shoulders, reduced seaming and double stitching keep you mostly dry
- Alpha construction separates wind/water protection layer from insulating layer for better ventilation and moisture evaporation
- Raw-edge waist lies flat and moves with you
- Raw-edge wrist cuffs lie flat for a perfect interface with gloves
- Stretch fabrics with advanced patterning make for an excellent close-to-body fit that still accommodates a wide range of body types
- 3 rear pockets with reflective laser-cut drain holes

Part Numbers

Option UPC MPN Store SKU
Light Black/Black / Small 08055688539511 B17502851-2
Light Black/Black / Medium 08055688539528 B17502851-3
Light Black/Black / Large 08055688539535 B17502851-4
Light Black/Black / X-Large 08055688539542 B17502851-5
Light Black/Black / XX-Large 08055688539559 B17502851-6
Light Black/Black / XXX-Large 08055688539566 B17502851-7
Matador Red/Black / Small 08055688929039 B17502616-2
Matador Red/Black / Medium 08055688929046 B17502616-3
Matador Red/Black / Large 08055688851880 B17502616-4 210000021488
Matador Red/Black / X-Large 08055688929053 B17502616-5
Matador Red/Black / XX-Large 08055688929060 B17502616-6
Matador Red/Black / XXX-Large 08055688929077 B17502616-7
Orange/Black / Small 08055688539467 B17502341-2
Orange/Black / Medium 08055688539474 B17502341-3
Orange/Black / Large 08055688499532 B17502341-4
Orange/Black / X-Large 08055688539481 B17502341-5
Orange/Black / XX-Large 08055688539498 B17502341-6
Orange/Black / XXX-Large 08055688539504 B17502341-7
Red/Black / Small 08055688711108 B17502231-2
Red/Black / Medium 08055688711115 B17502231-3
Red/Black / Large 08055688711122 B17502231-4
Red/Black / X-Large 08055688711139 B17502231-5
Red/Black / XX-Large 08055688711146 B17502231-6
Red/Black / XXX-Large 08055688711153 B17502231-7
Silver Gray/Black / Small 08055688929084 B17502870-2
Silver Gray/Black / Medium 08055688929091 B17502870-3
Silver Gray/Black / Large 08055688929107 B17502870-4
Silver Gray/Black / X-Large 08055688929114 B17502870-5
Silver Gray/Black / XX-Large 08055688929121 B17502870-6
Silver Gray/Black / XXX-Large 08055688929138 B17502870-7