Inner Fabric: The inner fabric of the Duality is a PEAQ synthetic ECO lining that is supremely comfortable next to skin and is highly breathable. It is also 100% recycled, meaning that the Duality has very impressive environmental credentials as well as being able to keep you warm and dry. Starting at the top, Montane equip the Duality with an insulated hood that has plenty of room to fit your beanie or cap under whilst providing extra warmth on the colder days when you need it. It is adjustable which is handy on windy days when you don't want the hood flapping around allowing in cold air, and has a stiffened peak to keep the rain, wind and snow out of your eyes. If you don't require the use of the hood, it can be rolled away neatly. Further down, you've got a full-length YKK zip with an internal storm flap to stop rain from getting in; it can also be used for extra ventilation just by unzipping it as and when you need.