In recent years there's been a boom in active insulation. Yes, it pays to be cynical about trends in the outdoor industry, but this is one that we're fully on board with. These lightweight, versatile layers are fantastic all-rounders, capable of being worn throughout a wide variety of activities in a similarly broad range of environments. Whilst The North Face set up the Casaval Hoodie as a 'mountaineering jacket' and a 'mid layer' I'd actually say that its scope is significantly greater than that. Since its arrival, we have worn this jacket for pretty much everything.Show less