Built with temperature reacting Thermore Thermal Booster insulation in a water-resistant stretch knit shell, the 2XU Men's Ignition Insulation Jacket allows you to attack your run, regardless of the weather. Lightweight and compressible, the Thermore Thermal Booster smart insulation is engineered to keep users comfortable over a wide range of conditions, boosting warmth by as much as 20% as the temperature drops. A stretch knit, downproof shell with environmentally responsible C6 DWR treatment to withstand rain and showers this fully reversible jacket has side zip pockets that provide safe storage for your phone, cards or keys during any physical activity, while reflective logos and trims give greater visibility in low-light conditions.