ideal for cool transitional months and milder winter conditions Thermal Roubaix fabric and fleece-backed Protegge membrane. Thermal Roubaix is made of hollow-core microfibers that trap air (maintain loft) for maximum heat retention The fleece-backed Protegge membrane is wind and water-resistant, shedding intermittent showers and mist from dampening your core Further protecting you from inclement weather, the jacket's P-10 membrane is strategically placed along the jacket's backside for extra wind and water-resistance. This membrane is also highly reflective, with refined glass crystals embedded into the membrane for luminescence in low-light conditions. Other functional features include bright color pops along the hem and zipper for boosted visibility, as well as a dropped rear hem for extra coverage and protection. Additionally, you'll find three rear pockets for conveniently stashing energy gels and extra layers.