The Kilpi RAYEN-M is a men's ultralight jacket. The jacket is made of ultra-light SIBERIUM material, coated with a lightweight DWR water-repellent layer. The hood, chest and shoulders are made of windproof, densely woven material. For weight reduction and better functionality, parts of the back and armpits are made of mesh material. The sleeves are extended with thumbholes and a watch cross-section on the left hand. For your comfort, we have chosen a looser cut and the main zipper is two-way for better and easier ventilation. This running jacket, with reflective elements, can be easily packed into one of the zippered pockets, which makes the Kilpi RAYEN-M an essential part of your sports equipment! Material composition: 100% nylon