Columbia Sportswear Arcadia II Omni-Tech&reg; Jacket 100% nylon Stowable in its own pocket, Columbia Sportswear's Arcadia II jacket features an Omni-Tech waterproof breathable membrane to keep you dry while you're out enjoying your life. Omni-Tech waterproof breathable membrane blocks precipitation and allows perspiration vapor to escape, so you remain dry inside and out Fully seam sealed for complete waterproof protection Attached storm hood Dual storm flaps