Castelli Men's Alpha Ros 2 Jacket

This jacket is exactly what we think is the perfect winter jacket. We started by making a list of the things we didn't like about current jackets and set out to fix them - and in doing so, make our best jacket yet.

The first problem to solve was moisture management. Even the best fabrics available today offer good levels of breathability, but can’t keep up with the sweat generated during high-intensity riding. So we invented a dual-layer construction that allows an outer layer of wind protection to be opened while keeping the insulation layer closed, allowing air to circulate inside the jacket to wick away moisture while avoiding direct contact with the skin. On a long climb, we open the outer layer completely to allow moisture to escape, and when we start the descent, we close the outer layer and are completely dry inside. It works so well that sometimes it feels like magic. New this year is a softer, warmer 3D fabric that provides better heat and moisture management and a better fit.

Next, we focused on the openings: the neck, the waist, and most importantly, the cuffs. The neck is high and designed to move with you, whether you’re standing or in an aerodynamic position, whether you’re a January hero and attacking your comrades. For the waist, we created a stretchy layer with a silicone bead that lies flat and completely blocks the wind without bunching or riding up. New this year is an all-new dual-layer cuff opening, with an inner layer to place under your glove that seals tightly over your wrist, and an outer layer that goes over your glove so any rain falls on the outside of the glove and doesn’t end up inside.

Of course, the ultimate jacket will also hold up well to moisture, which is why we used GORE-TEX INFINIUM™ WINDSTOPPER® fabric and waterproof taping on the key seams around the shoulder. The other seams are concealed to prevent direct water runoff, and the fabric’s water-repellent treatment is enough to keep most moisture out. We call it “mostly waterproof,” using our own subjective judgement to strike a balance between water protection, breathability and comfort. That’s not to say that not a drop will ever get in, but we do long rides in pouring rain and stay completely dry.

All of these features make it a favourite among Team Ineos riders, and the most versatile performance jacket for cold weather training we've ever created.

Technical specifications