The Mammut Aenergy Light ML Hooded Jacket Men is a breathable fleece mid-layer. The Pontetorto® DryFast® material on the back and under the arms ensures that these parts of the body do not overheat and provides sufficient moisture release. Warm Pontetorto® TecnoStretch® is used on the front to provide protection from the wind (hybrid construction). The athletic fit means that the jacket fits the body snugly, while the tight-fitting hood can be worn easily under a helmet.