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.
The Ostro Windproof packs down small into its own pocket, has a helmet-friendly hood and good ventilation options. Internal stuff pocket with loop for attachment for transportation. Stowable helmet-friendly hood with low profile peak and dual adjustment. Temperature control from ventilation zips that also provide access to internal pockets.
The Ostro Windproof is specifically designed to be compatible with the Ostro Fleece. Together these two garments create a versatile waterproof system.