The Women's Troposphere Down Fibre O2+ Jacket from Jack Wolfskin is an insulated waterproof jacket that will keep you warm and toasty throughout the winter. It boasts a combination of down and synthetic fibres to offer you the best of both technologies. It has an excellent warmth to weight ratio and is relatively sleek as well as being resistant to moisture to ensure it will always keep you warm. The hood and inner comfort cuffs are excellent at retaining heat to keep you cosy while the pit zips can be opened to dump heat should you find you need to. A great option for cold climates.