Micro climate sensors activate localized ventilation when needed

Temperature balance built for the trailsthe Janji men's Zephyrunner Wind Shell is an ultralight, packable essential that helps you effortlessly navigate changing conditions by balancing durability, breathability, and coverage for year-round adventures.

• Strategic breathability - Back panel venting keeps you comfortable while maintaining wind protection.
• Better than zero - The Zephyrunner strikes a perfect balance of wind-breaking breathability with a CFM rating of 16 engineered specifically for running and high-output activity.*
• Multi-condition preparedness - Hyperlight, durable nylon shell is water-resistant and wind-blocking for whatever the trail may bring.
• Ready for anything - Stows into chest pocket for easy packability.
• Secure fit - Bungee hem and hood toggle allow for an adjustable fit on the fly, reducing exposure in windy conditions.
• Keep it separated - Two zip hand pockets and a zip chest pocket stash small essentials close at hand.
• Visibility - Signature reflective logos for improved visibility in low light.
• Zephyr - 100% nylon with PFC-free C0-DWR (durable water repellency)
• Weight - 136g / 4.4oz (Ms Medium)

*CFM is the rating that measures how windproof a fabric is: 0 is totally windproof. With a CFM of 16, the Zephyrunner cuts most wind while staying highly breathable, ideal for running performance.

Weather sealed layers protect against unexpected showers while allowing airflow