Here is an interesting, if slightly bizarre jacket from Stone Island.  They have taken their classic ‘989 Ice Jacket and treated it with a thermo-sensitive liquid crystal coating, that changes colour at low temperatures, getting darker between 15 °C and 10°C.  It’s a fun concept, but I’m not sure if its something I would choose to wear. However, if you do like the sound of it The Ice Jacket is available from Stone Island now in a rubberised material (with or without liner) and a moleskin fabric, the ice colour change effect is also available in a trench coat style.