Neon Get all the performance of the Mac in a Sac Classic Jacket, with a new vibrant Neon collection! It's highly waterproof, breathable and offers near fluorescent visibility. Perfect for running, cycling or walking. Lightweight Neon is a bold new lightweight rain jacket, that is the best performing pack away in its class. Along with the new colours, it also features a concealed adjustable hood, contrast reversed zip and reflective branding and piping.