Made for alpine travel and mountain realities, the Beta SL Jacket — Arc'teryx's lightest Beta — delivers complete waterproof, windproof, and breathable protection without sacrificing features or packability. The next-generation GORE-TEX 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 an embedded RECCO reflector can aid in search situations. Previously sold as the Beta Lightweight Jacket.