This innovative base layer takes a little explaining to truly appreciate - don't think of it as a long sleeve base layer. Think of it as a short sleeve base layer with arm warmers attached. It's made to be used with a short sleeve jersey, like the Castelli Fedele Jersey, in cool, windy conditions.

The entire top uses a seamless construction and the arms are made of a heavier weight material than the chest. The medium weight makes it great through multiple seasons. When the temperature heats up, just push the sleeves up since the ultra stretchy construction makes it easy and comfortable.

Gone are the days of the dreaded gap between your arm warmers and jersey. The Feroce base layer allows a seamless transition and creates the perfect temperature equilibrium.