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Castelli Mortirolo 4 Jacket - Men's
Sale $139.96$199.95 30% Off

Item # CST00DA

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Item # CST00DA


Clear skies, dry roads.

Dry winter days are often the ones that make us feel the guiltiest for not being out on our bikes; clear skies, bare roads, and sun bring far fewer challenges than messy, wet days do. If you're thinking about training through the winter (whether for a spring goal race or because you're tired of staring at your basement wall on the trainer for 3 months) the Castelli Men's Mortirolo 4 Jacket makes an excellent investment in dry-day comfort. Lightweight and warm, the Mortirolo doesn't come with as much protection from wind and rain as siblings like the Senza or Espresso, but what it lacks in weatherproofing, it makes up for in lightness.

Cut with a slim silhouette, the Mortirolo 4 was bred for versatility; it's meant to be just as comfortable during a tough set of intervals as it is during a tempo ride or endurance-building base miles. Though not as contoured as Castelli's race kit, the Mortirolo easily accommodates a baselayer without ever appearing, or feeling, sloppy in the saddle.

A Gore Windstopper X-Fast front panel does shield against rain and wind, while Castelli's thermal Warmer fabric, aptly named, covers the back of the jacket. It provides ample stretch and breathability to help you avoid overheating on cold days with warm sun, especially as you tackle hard efforts. Zippered vents along the chest further improve the jacket's ventilation, while a silicone waist gripper holds the drop hem in place as you stretch out into your drops.

  • Ride through clear, cold days in this versatile jacket
  • Fit accommodates a baselayer while remaining tailored
  • Fabric provides some wind- and rain-resistance with warmth
  • Drop hem with gripper protects against wheel spray
  • Chest vents prevent the jacket from trapping heat
  • Reflective accents help you stand out on the roads
  • Recommended for temperatures into the low-40s, but we use it in the 30s, too

Tech Specs

[front] Gore Windstopper X-Fast, [back] Warmer
zippered front vents
3 rear
Claimed Weight:
[large] 393 g
Recommended Use:
Manufacturer Warranty:
1 year

Size Chart


Men's Apparel
Chest 36.2in
Waist 31.5in
Hip 37in
Inseam 31.9in
How to Measure:
For best results, take measurements over your underwear.
Measure under your arms, around the fullest part of your chest.
Measure around your natural waistline, keeping the tape a bit loose.
Measure around the fullest part of your body at the top of your legs.
Using pants that fit well, measure the crotch seam to the bottom of the leg.

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  • Familiarity: I've put it through the wringer
  • Fit: Runs small

Castelli is based in the foothills of the Italian Alps (Dolomites). They know winter cycling.

Application: Castelli officially rates this jacket for use in cold, dry weather from 60° down to 42° F. This is fantastic as this is the temperature range the majority of us ride in the Winter (in the 40s).

1. The clever, innovative, front chest vents. These provide great versatility! For example, close the vents and select a winter-weight baselayer, ride hard, and this jacket will keep you warm down to about 40-35° (temp sensitivity is individual).

Yet, with the vents open and a light-weight baselayer on, this jacket also works up to 60°. Awesome.

2. Authentic Gore Windstopper textile is simply the best in the business. It is non-flapping, insulating, windproof, and water-resistant; yet breathable. So it protects fantastic against cold but also vents away sweat build-up extremely well. So no dreaded "sweat in a bag" occurs in this jacket.

3. Also, Windstopper provides a soft and snug (and quiet) 'aero' fit. This jacket does NOT flap in the wind.

The overall performance and versatility of the Mortirolo jacket is benchmark in this temp range.

Cons: The Mortirolo protects well against fog, mist, and drizzle. But Windstopper is not waterproof. So, if the weather is threatening full-on rain, take along a light, taped, dedicated rain shell (like the Superleggera, Tempesta, or Dolomiti).

***Sizing: As castelli vets know, Castelli runs small. Italian sizing -is- different than US sizing. So, size up +1 here from your normal street size. Still, the Mortirolo will fit snug (as it is designed to).***

PS. _The Mortirolo Pass is one of the highest and most famous climbs in Europe. It is a legendary stage at the Giro d'Italia.

Ridculously small

  • Familiarity: I returned this product before using it
  • Fit: Runs small

I have a number of Castelli XL jerseys and jackets. They all fit fine. This year for some reason everything seems to be running very small. Local bike shop said the same thing. XL more like a small large. Doesnt fit at all. Small in shoulders, arms etc. Short as well. Looks nice. Too bad.

I have a XL Castelli Jacket already!

  • Fit: Runs small
  • Size Bought: XL

It pisses me off to no end that their tailoring is not consistent! I am 5'11" tall 180 pounds and these Jackets should fit! I usually wear a large. I have an XL Castelli Jacket already but these ride up into my arm pits, even though the sleeves are more than long enough! Who the hell you making this gear for, only stick men that are doping?

Questionable Quality Control

  • Familiarity: I returned this product before using it
  • Fit: True to size

After unpacking the jacket, I noticed that the 'Castelli' script logo on the waistband of the jacket was misspelled ("Castell" instead of "Castelli"). Returned immediately. If Castelli can't even get that right, what else have they missed...?

Questionable Quality Control

P.S. Probably a one-off. Mine came with all letters intact.

Kinda negative approach Joe. Anyway, I own 20+ pieces of Castelli kit -including the new Mortirolo 4 jacket (in black). Nothing I have ever purchased from Castelli has had any problems with missing letters. Just saying.

mine is spelled with a E castelle joke! not true!