This is a lightweight base layer designed to be worn next to the skin and is ideal for cooler days or as a layering piece. This fabric is a super soft polyester with a peached finish in a modern marl look. Wicking and evaporation results are very good. The front zip allows flexibility for venting once you have warmed up on your run. This updated style has a warm high collar featuring a small notch allowing for neck movement, thumb loops and reflectivity.