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The Outdoor Research Women's Helium II Jacket is an ultralight rain jacket for at-hand protection while climbing or ultralight backpacking. The Helium II weighs in at 5.5oz (size medium) and packs into its own chest pocket for clipping to your harness or the outside of your pack for quick access.
The Pertex Shield+ 2.5L fabric is 100% nylon 30D ripstop and fully seam taped, making it 100% waterproof. The zippers are water-resistant to prevent leakage while the elastic cuffs and drawcord hem seal out drafts. Tiny package, huge waterproof results.