Arc'teryx took their popular Alpha SL jacket and completely redesigned it for 2012. The newer Arc'teryx Alpha SL Hybrid features extra-durable GORE-TEX® Pro Shell in the shoulders and underarm gussets but still retains the ultra-lightweight GORE-TEX® Paclite® on the body. This change helps to substantiall increase durability in high-wear zones but still exceeds in reducing excess bulk and weight.