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Castelli Alpha Ros Light Jacket

Our model's size & fit
Our model is 1,83 m tall, has a chest size of 103 cm and wears size XXL.
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  • Free tracked delivery to Finland
  • Trustpilot review 9.2 out of 48.726 reviews

Pros & Cons

  • A highly functional jacket in both wet and dry conditions.
  • Excellent breathability since not all the seams are taped off.
  • Not all seams are taped off so water can eventually find its way in.
Read more on what our customers have to say about this product


Brand Castelli
Cold Protection ★★★★☆
Reflective elementsYes
Waterproof Rating ★★★★☆
Breathability ★★★★☆
Weather Type Wet weather with 10-18 °C
Fit Snug
Zippered pocketYes


The Castelli Alpha Ros is a lightweight and warm long sleeved jersey. The Alpha Ros has been given a thorough technical upgrade for this year. It has been fitted with the RoS technology, which is shorthand for Rain-or-Shine. This label is only awarded to the most technologically advanced products in the Castelli range, which excel in both dry and wet conditions. Dry conditions demand a comfortable and breathable product, which is capable of quickly moving sweat away from your skin. The rain requires a jersey which can keep you warm and dry. The Alpha RoS jacket combines both of these requirements into a single product.

The materials on both the front and rear are completely new, marking a tremendous step forwards in the field of rain protection. Only the most essential points of the jacket use taped-off seams. Castelli refers to this as "Functional Waterproofing". They can't ensure that not a single drop of rain will find its way in of course. What they can promise you is that, with the Alpha RoS, Castelli has developed a jersey to keep you warm and dry in various conditions.

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4 reviews

11 reviews
Cold Protection ★★★★☆ ★★★★★ ★★★☆☆ ★★★☆☆
Sex Men Men Men Men
Collection Autumn / Winter 2017/2018 / Autumn / Winter 2019/2020 Autumn / Winter 2017/2018 / Autumn / Winter 2018/2019 / Autumn / Winter 2019/2020 Autumn / Winter 2019/2020 Autumn / Winter 2019/2020
Which T-shirt size is most common in your closet? S / M / L / XL / XXL S / M / L / XL / XXL S / M / L / XL / XXL S / M / L / XL / XXL
Reflective elements Yes Yes No No
Waterproof Rating ★★★★☆ ★★★★☆ ★★★★☆ ★★★★☆
230,00€ 299,00€ 200,00€ 240,00€
This product View product View product View product


8 / 10

J.C., 12 March 2019

Goed jasje met windstopper voor het vroege voorjaar en de herfst.

Wielerkleding is lastig bepalen. Welk jasje is voor welke weersomstandigheden geschikt? Natuurlijk is dat deels persoonlijk. Dit jasje kan goed vanaf 8 graden Celsius met bijvoorbeeld een Craft onderhemd. Is het kouder, dan heb je nog een extra laagje nodig. Het zou handig zijn, wanneer Mantel daar iets over aangeeft.


  • Binnenjas kan los voor meer ventilatie.
  • Uitstekende pasvorm
  • Mouwen lang genoeg.
  • Zak met ritssluiting


  • Prijs

10 / 10

Bringme Thibau, 20 February 2019

Beter als de perfetto bij zeer koud weer

Gebruikt in helse omstandigheden en deze alpha ros geeft veel meer beschutting tegen regen, wind en koude (-2gr) dan de perfetto of de gabba!! minpunten nog niet gevonden.. buiten het feit dat je hem alleen op training kan gebruiken en niet in competitie, maar dat is ook het doel niet.


  • regenwerend
  • isolereert
  • warmte


  • alleen voor training
  • prijs

10 / 10

Alex, 11 February 2019

Prachtig mooi fietsjack

Is een zeer goed doordacht product past als een tweede huid. Is ook bij druilerig koud weer voldoende warm. Perfecte levering!

10 / 10

Hemmie, 8 December 2017

Zeer aangenaam fietsshirt voor frisse dagen in voor - en najaar


  • aangenaam warm
  • Regenbestendig
  • Licht
  • Zit zeer prettig en comfortabel


  • prijzig

All specifications

Manufacturer specifications

• The Rain or Shine concept provides insulation and breathability for cold & dry rides but with sufficient waterproofing for rides in wet conditions as well
• Lightweight, double layer fabric and wind protection with significant rain protection
• Taped seams on the shoulders & use of limited seams
• Windstopper 150 fabric on the front and shoulders
• Nano Flex Xtra Dry rear
• ProSecco Strada inside with double zipper
• Contoured collar to flow naturally with the shape of your neck in a cycling posture
• Castelli silicone gripper on the stomach to prevent the jacket from riding up
• 3 rear pockets with reflective laser-cut openings
• Rough finish at the waist so it moves with you
• Waterproof YKK Vislon zipper
• Ventilation on the rear
• Zippered pocket