The Switch Pro Hooded Jacket is a hybrid "movement insulation" jacket, that combines Polartec® Alpha insulation and a windproof 20D shell for the torso with Pontetorto® Tecnostretch 187 fleece sleeves and panels. The result is a lightweight, slim-fit jacket which maintains core temperatures in cooler weather, but retains breathability and mobility in the fleece arms and side panels. It's an incredibly versatile layering piece that can also be worn as a stand-alone outer layer. Switch Pro Hooded Jacket - Men's