Stay stylish and comfortable with the Arc'teryx Women's Purple Jacket. Perfect for outdoor adventures. Beta SL Jacket Women's Made for alpine travel and mountain realities, the Beta SL Jacket – our lightest Beta – is carefully designed to deliver complete waterproof, windproof, breathable protection without sacrificing features or packability. Its next-generation GORETEX ePE membrane is light, thin, strong, and PFC free. C-KNIT backer technology improves comfort and breathability. The helmet-compatible StormHood protects without compromising vision, pit zippers ventilate, and a RECCO reflector can aid in search situations.