Lightweight weather protection altura use their altura shield technology to provide you with protection from wind and water whilst still offering high levels of breathability so you get maximum comfort this jacket is also light weight and packable enough to stow in a jersey pocket or backpack for when you really need it for this jacket altura use their ergofit 3d patterning designed to offer you a garment that fits just right when in a riding position the fit is of their 39sport fit3