verview The Paramo Men's Ostro Windproof offers packable protection for runners, cyclists and walkers the jacket packs down small into its own pocket, has a helmet-friendly hood and good ventilation options. For high energy activities such as running and cycling, it's important to have a lightweight windproof on hand for protection from windchill when at rest or in an emergency. For walkers, it is useful to have a protective layer that uses minimal space in your bag. The Ostro Windproof uses lightweight Nikwax® Windproof fabric with a TX.Direct water-repellent treatment for shower protection. It compacts into its own pocket and combines with the Ostro Fleece for good weather protection in wet or cold weather. Features Helmet-friendly, securable "halo" hood with low profile peak and dual adjuster to move with you and not impair your vision Ventilation zips on the torso give good temperature control and also allow access to two internal pockets Stuffable into inside internal pocket with loop for easy transportation. Reflective flashes on sleeves, shoulders and hood to improve visibility in low light conditions. Scooped tail with hem drawcord for lower back protection. Excellent sleeve and shoulder articulation for full movement range during activity. Renewable water-repellency with PFC-free Nikwax® TX.Direct. Designed to be combined with the Ostro Fleece for very versatile weather protection. Nikwax® Windproof cuts windchill and protects your insulation but still provides excellent moisture vapour transfer, allowing perspiration to escape. The fabric is light but very durable and UV resistant, so providing excellent protection in all environments. It also deflects rain thanks to a Nikwax waterproofing treatment. It can be worn alone, or combined with Nikwax Fleece to create a fully directional waterproof system, equivalent to an Analogy waterproof. Size Guide Size Guide                To fit chest up to                      cm                    in S 97 38 M 101 40 L 109 43 XL 117 46 XXL 125 49 Garments are specified using metric measurements, therefore the metric measurements in this chart are the most accurate. Imperial equivalents are rounded to the nearest half number.   Measurements relate to the body rather than garment measurements. Paramo Ostro Men's Windproof Jacket Black/Dark Grey