The PROFOIL climbing skin is a big departure from traditional climbing skins. Made from a dense by pliable plastic, the PROFOIL has many benefits over mohair or synthetic skins. First is that it's durable. I've taken these in areas of low snow (not recommended) where traditional skins would rip off along the skin track. These can scratch but will still retain their structure. They also don't absorb water on those hot spring days, staying dry in your pack and not adding weight. Other than that, they perform similar to normal skins. Version 2.0 rolls up into a nice compact ball and is easy to store for the descent and reapply for the ascent.
*note that ranger series Profoil uses tip loops instead of displayed z-hooks.
Here's what Fischer has to say:
The revolution: Fischer's exclusive PROFOIL is the easy-to-use and lightweight solution for all kind of randonnée skiers. The waterproof full-length ski base attachment powered by Fischer's Crown Technology is eliminating weight gain while ascending and provides permanent grip in all conditions.