Castelli Alpha RoS 2 Jacket Men’s
The Castelli Alpha RoS 2 Jacket is an exceptionally good windproof for cold weather. It’s versatile, warm, and highly water resistant. This is an all-in-one winter jacket that's hard to beat.
The exterior is made from Gore-Tex Infinium Windstopper 150 which, as the name suggests, prevents cold air from blowing in. It's highly breathable so you don't get that boil in a bag effect when you hit the climbs, and it’s way more water-resistant than you might expect, a durable water repellent (DWR) coating helping out the internal membrane in this respect. The Alpha RoS does a great job of keeping road spray and short showers out.
The other crucial element of the Alpha RoS 2 is the clever double-layer construction. Opening the front reveals fleecy inner panels that attach at the sides of the jacket and zip together in the middle. Effectively, it's like having the front half of a gilet attached in there
The same fabric is used inside the sleeves, extending around about two-thirds of the circumference of your arms.
The double layer at the front gives you different options. You can have both closed up when you want maximum warmth. You can open the outer but leave the inner done up when you want to let humid air out on a climb. You can even push the inner layer to the sides and zip up the outer if you want windproofing but don't need so much insulation on your chest.
Castelli says the Alpha RoS has a temperature range of -5°C to 10°C and we’d say that’s about right. The premium-quality fabrics and double-layer construction mean you can stay comfortable across a range of winter temperatures – even freezing and below – without getting too sweaty when you hit the climbs. The all-round performance really is something special.