Trade Thermo Jacket, Black XL - 

This jacket is a game changer – it's made from something called Insatherm, which even sounds warm, giving you proper insulation for your body with flexibility where it's needed. There are 3 zipped pockets to keep your stuff safe and secure, and an elasticated hood, hem and cuffs to keep the wind out and warmth in. You can ditch all of those other jackets, this is the only one you’ll need.