North Face athletes Conrad Anker, Jimmy Chin and Renan Ozturk climbed the Shark’s Fin on Mount Meru in 2011. After attempting the climb in 2003 already and being forced to retreat just underneath the summit, the trio managed to climb the route successfully.
As Jimmy Chin explains their equipment and clothing played a role in this. When climbing (or doing any other sport in the mountains) conditions and temperature can change with the blink of an eye. Therefore one has to be able to adapt and choose clothing that helps enduring the weather.
One does not have to rely on North Face clothing, but I like the way, the layering concept is being presented in this video.