The (often associated with "WiN" or "WIN" in retail contexts indicating "Wind" or "Weather" protection) is a high-performance, ultralight rain shell designed for emergency weather protection. Core Performance
Weighing approximately 150g , it is extremely lightweight and compresses into its own pocket for easy storage. Ok RE Helium 2 [WiN]
It is fully waterproof and serves as an excellent windproof barrier for hiking or running. The (often associated with "WiN" or "WIN" in
Reviewers from platforms like UKClimbing and Mountain Wagon categorize it as "Dirtbag approved"—an affordable, effective tool that does exactly what it's meant to do without extra frills. Gear Review: Outdoor Research Helium II - Mountain Wagon Reviewers from platforms like UKClimbing and Mountain Wagon
To save weight, it lacks features like hand pockets or pit zips, which can make it feel clammy during high-exertion activities. Pros and Cons Pros Cons Ultralight: One of the lightest shells available. Breathability: Can get sweaty/clammy inside.