Columbia Women's Heat 360 Jacket Like New Size: Medium Working like a space blanket, the Omni-Heat silver dot lining helps to reflect your own warmth back at you, keeping you warm while also allowing excess heat to escape. Microfleece is super soft and cozy and 4-way stretch creates a perfect fit with maximum mobility. Other details include adjustable toggle, reflective hits, a zip-closed security pocket and two hand pockets.