The Black Diamond Men's Distance Wind Shell Jacket is an ultralight shell that packs into its own pocket so you can take it up alpine climbs and treks for an extra layer of weather protection. It features the innovative Green Them Technology for breathable water protection. It's an environmentally-friendly treatment that provides superior wind- and water-resistance than most DWR coatings, and it's permanently hyper-fused into the jacket's fabric so you never have to re-treat it. The fabric boasts better breathability than most breathable fabrics. Unlike standard breathability, this fabric starts to breathe the moment you put the jacket on.