The big Arc’teryx story at ORWM is the Alpha IS Jacket.
The IS suffix is for Insulated and the Alpha IS relies on ThermaTek for incredible warmth to weight ratio. ThermaTek is a hollow core fiber which gets a DWR bath and is then laminated to a face fabric with a second DWR bath. That face fabric is an air permeable Gore-Tex fabric. It’s a very technical piece. Use the Alpha IS in cold/wet/windy environments down to around -15 Celsius.