I am a big fan of the Thule brand (which I prefer to Packline). One of its latest inventions is the Thule SkiClick system. Thule SkiClick is a smart roof mounted ski carrier, ideal for safely transporting cross-country skis.
It’s a lightweight, space-saving design which attaches to walls and roof racks with a simple click. Because of its small shape, it delivers minimum wind drag for less fuel consumption. As a thin material, it packs up tight when not used.
It fits all Thule bar load carriers, and has a safety lock. And when at home, you can store your x-country skis at the wall thanks to its wall storage functionality.
Me doing some cross-country skiing: