The new Atomic Ridgeline Hybrid Down Insulator M is the latest in our line of skiable midlayers. A skiable midlayer is an incredibly useful piece of kit – perfect on its own in good conditions and great under a shell when it’s colder. This new Ridgeline Hybrid Down Insulator is extra special for two reasons: it uses a Pertex Endurance coated fabric that makes it water resistant and totally windproof. Then it features new PrimaLoft Down Blend inside. This new hybrid down combines ultra-fine PrimaLoft fiber and white duck down so it weights virtually nothing. And unlike other down insulation materials, it dries quickly and stays warm even when wet.