On a morning trail run over hilly terrain or other sporting activities where you need warmth but full freedom of movement for the arms, a fleece vest is ideal. Running weather doesn't get much better than when it's sunny, almost windless, and dry. This is exactly when we need a garment that doesn't restrict freedom of movement at the arms but still keeps the upper body warm. They're also perfect for wearing in your free time when gardening or camping. A fleece vest also works very well under a hardshell as a warming layer. It stores heat very well and is not only soft on the outside, but also feels very soft on the skin and is breathable, to boot.