I don't use these but they look like a great deal for people who do. If you get it reserved you can pick it up in your local argos.
Details: Polyester Shell. * Cotton lining. * 500gsm hollow fibre filling. * Drawhood style, to prevent draughts and insulate head. * Compression bag included. * Wind baffle. * Collar. * Pocket. * Zip webbing. * 2 way zip to couple. * Comfort temperature -27C to +2C. * Size (L)220cm, chest 80cm, foot 60cm. *