This is the vest made for when you need warmth for the entire ride. It’s our warmest vest, but thanks to exceptional breathability it covers a wide temperature range. Castelli Ristretto fabric technology is what makes it so versatile. Engineered air permeability means that we create fabrics that are mostly windproof but allow a very small amount of air to pass through the fabric, which carries away more sweat to keep you drier. The front is medium-weight Ristretto fabric, while the back is a stretch woven for even more breathability. You stay drier, which means you can stay warm with less bulk. You can adjust ventilation with the double-opening YKK® Vislon® zipper. Three spacious back pockets hold your gear. The collar is high enough that you can leave your neck warmer at home.