The Columbia In Bounds 650 TurboDown Jacket is an excellent choice when you need options. This Interchange System jacket allows you to have a shell on the normal ski days, a liner you can zip in when the temperatures really drop and that liner which can be used on its own on the cool days of fall and spring. Omni-Heat technology is simply a marvel in warmth and the reflective design traps body heat keeping you warm during long days out on the mountain. In addition to Omni-Heat, this jacket features a 550 Fill Power Down insulation that will help keep you incredibly warm on even the coldest of days. Omni-Tech Technology is waterproof and breathable so that you stay dry even when the snow is hitting sideways. Underarm venting is put in place for when things start to heat up and you need to self-regulate your body temperature.