New To Sigma Sports?
£10 off £100* - code SIGNUP10

CHPT3 Alpha ROS Jacket

★★★★★ ★★★★★
MSP £275.00 Save 30%

Select a colour and size to view stock availability

Alpha ROS Jacket

We're sorry, but unfortunately, we're unable to ship this item to your country

Product ID: 1105277

The ultimate cycling jacket, the CHPT3 Alpha ROS is highly functional in both wet and dry conditions.

The unique two-layered construction is engineered to bring breathability despite the wet weather protection offered by the mix of fabrics. Store nutrition, tools and other spares in the three rear pockets.

CHPT3 Alpha ROS Jacket

In a collaboration with Castelli, producer of some of the best technical cycling kit around, CHPT3 have created the Alpha ROS, a game-changer when it comes to cycling jackets. Come rain or shine, the Alpha ROS will excel.

The Gore-Tex® Infinium™ membrane, together with a DWR treatment, sealed seams and a waterproof zip effectively keep the rain out, and when the sun comes out the double-layered construction ensures moisture evaporates fast and you can unzip the top layer to further improve ventilation. The jacket has a close fit with flat wrist cuffs that'll sit neatly under gloves, plus silicone on the bottom hem to hold it securely in place. Three rear pockets provide ample space for spares and nutrition, and they're easy to access mid-ride.


  • Softshell jacket
  • Gore-Tex® Infinium™ fabric ensures high breathability on cold, dry rides with effective waterproofing for wet rides
  • Increased ventilation and better moisture evaporation thanks to separate insulating layer
  • Advanced patterning for an excellent close-to-body fit
  • Taped seams on shoulders
  • Full-length, waterproof YKK® Vislon® zipper
  • Flat wrists and waist panel
  • Three rear pockets and additional security zipper pocket
  • Silicone bottom hem

CHPT3 Alpha ROS Jacket Sizing

Close menu