I have a lot of jackets for different weather and climate but this is my first Mammut. Recently I've been a big fan of RAB due to the fitted body, wide shoulders and longer arms which suits me much better than the general square shaped bodied jackets. I bought the Mammut as I needed a new primaloft jacket for antartica when it's not too cold and because I can't get on with the RAB insulated jackets being a bit too baggy. Love the tapered and shaped sleeves, perfect length and amazing hood. Every bit as good as any hood I've used for adjustments and staying where it's supposed to. Went out yesterday in the rain and glasses had no rain on them so the peak is just right too. Haven't tested this with a lot of sweaty activity yet to see just how breathable it is but it's very comfortable in the cold and when you step inside much like a down.