If you've got yourself a copy of this month's Whitelines you've probably already had to pick your jaw up off the floor after seeing the insane shots of Xavier de le Rue riding some of the craziest lines ever in Svalbard, one of the most hostile places on earth.

If teeth-shattering temperatures, polar bears and shonky paramotors weren't terrifying enough, the lines that are ridden and hinted at here are simply heart-stopping

Now Swatch and The North Face have released a trailer for the third in Mr XDLR's Missions series: Degrees North, chronicling his mad adventures with Ralph Backstrom and mountaineer/skier Samuel Anthamatten. From the looks of things, it's going to be as full on as Ed Leigh's descriptions from his Frozen In Time piece.

If teeth-shattering temperatures, polar bears and shonky paramotors weren't terrifying enough, the lines that are ridden and hinted at here are heart-stopping, some of the gnarliest we've ever seen. We totally can't wait for the full film to drop in the autumn.