These ELITE heated liners are perfect for when you need additional warmth on extra-cold days. With the ACTIVE WARM bonded polyester shell, you can pair them with your favourite pair of mitts or use them alone as thin gloves to stay warm when walking in town! The adjustable heat feature lets you control the temperature level, so you can stay comfy and beat the elements at the same time. The Warm Up liners rank 3 on our warmth level scale.