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The Outdoor Research Men's Helium II Jacket is an ultralight waterproof jacket for emergencies on the trail and rock. The Helium II is made with Pertex Shield+ DS 2.5L, a nylon 30D ripstop with a clear laminate. This fabric allows the jacket to pack down super small, into its own chest pocket. Weighing in at an average of 6.4oz (size large), you'll hardly notice it stowed away in your pack or clipped to your harness.
The waterproof jacket protects you from unexpected rain and harsh winds so you won't have to cut your trip short. The elastic cuffs, adjustable hood, and drawcord hem keep the fabric close to your body to prevent drafts and leakage. Outdoor adventures are much more enjoyable when you're able to stay dry during unfortunate weather.