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Through a seemingly endless onslaught of technical blends and synthetic wonder fabric, wool has persevered as an ideal fabric for warm, breathable, and naturally odor-resistant base layers. As such, the Castelli Men's Procaccini Wool Long-Sleeve Baselayer holds court as an important addition to your winter kit wardrobe. Castelli uses Nuyarn fabric, which blends wool and a bit of nylon to boost breathability and durability into a slightly relaxed fit that transitions seamlessly from coffee shop conversation to appropriately caffeinated ride time.

  • A versatile, wool-blend cycling base layer
  • Manages moisture and resists odor
  • Relaxed fit lends utility on and off the bike
  • Reviews
  • Q & A

Strong like

    Fairly warm and not scratchy. I’m 5’10” 175 lbs and found the XL is a bit looser fitting that most Castelli, which is the only reason I’m not giving it 5 stars.


      As with most Costelli, buy a size bigger than you actually are unless you're a pro hill climber. Otherwise, fits fine. As for the material, scratchy. I was disappointed. I figured Costelli would have some magic feel-good wool. Nope, it's wool.

      Great fit/functionality/looks.

      • Familiarity: I've put it through the wringer
      • Fit: True to size
      • Size Bought: Large

      Excellent all-around. I haven't used it on the bike, partly because I prefer sleeveless base-layers. Off the bike, it's incredibly comfortable and fits perfectly. None of that constricting feeling you get when wearing race-cut jerseys. The squared-off collar is a nice touch; you never realize how a regular collar gets in the way, at times. This is especially true when riding. The shirt just looks great, too; lots of compliments on this thing.