Our XT Alziro will be the first thing you pack for expeditions when experiencing changing weather & exhilarating conditions at higher altitudes. This technical thermal base-layer is constructed of three outstanding thermal fibres: merino wool, polyester & polypropylene. This combination provides insulation & breathability, while the pairing of polypropylene & polyester wicks away moisture that's crucial to stay warm, dry & comfortable in extreme conditions. The higher back panel of the XT Alziro Women's leggings / long johns will provide extra coverage & padding while wearing packs.