Designed for fast-moving alpine missions and everyday protection, the Beta SL in Vitality II is Arc’teryx’s lightest GORE-TEX shell. The ePE membrane delivers full waterproof, windproof, and breathable performance in a streamlined, packable build. A soft C-KNIT™ backer adds next-to-skin comfort, while pit zips, a helmet-compatible StormHood™, and a RECCO® reflector ensure you’re covered across technical and urban terrain. Light, tough, and built to move.