The Kilpi RAYEN-M is a men's running jacket made of the ultra-lightweight and breathable SIBERIUM material, which is treated with a light, water-repellent coating. The more stressed parts, such as the hood with reinforced visor, chest and shoulders, are made of a tightly woven windproof material. Breathable mesh material is used on the back and underarms to lighten the weight of the jacket. The total weight of the jacket is a mere 120 grams in a size M. The jacket easily packs into your pocket or running vest. The sleeves are extended and have a thumb cuff. There is a watch hole on the left sleeve. The high collar is lined on the inside with a soft material that won't irritate your face. The front zipper is two-way and is designed for better ventilation. The looser cut will not restrict your movement. The sleeve hems and lower hem fit beautifully. Of course, all Kilpi products have distinctive reflective elements. The Kilpi RAYEN-M is available in several colour options.