Arcteryxs lightest Beta jacket feels right at home in fell and mountain terrain, and in the active use of dedicated outdoor enthusiasts for whom light weight and comfort are just as important as weather protection. Thanks to pit zips and adjustable cuffs, the jackets ventilation is easy to fine-tune. This SL model boasts a lighter and more supple surface fabric compared to the base model, as well as a slimmer fit. In addition the SL has armpit zips for ventilation. In this model, the inner surface of the new PTFE-free Gore-Tex ePE membrane features a comfortable C-Knit backer. Weve come a long way from the plasticky feel of old three-layer shells! In a hurry, the Beta SL can be thrown on over a T-shirt, but the material works best with a technical or merino wool base layer. - Fitted model - Waterproof, windproof, breathable - RECCO reflector - Velcro-adjustable cuffs - Two external pockets and one internal pocket - Pit ventilation zippers - Helmet-compatible StormHood - Length in