Add an extra layer of warmth to your boots with the lightweight and comfortable Liner 2 from Kamik. Ideal for tall winter boots. Liner constructed of three layers: &amp#8226Layer 1: 2 mm Polypropylene wicks moisture away from the foot &amp#8226Layer 2: 5 mm Black polyester felt traps body heat keeping foot warm &amp#8226Layer 3: 1 mm Thermal foil deflects cold air allows moisture to escape Reinforced seams and heel guard offer excellent durability. Easily removable for quick overnight drying. Made of 97 percent recycled material. Comfort rated to -40&amp#176F/-40&amp#176C (Yup, the rating conversion is correct). Imported. Measurements: Weight: 7 oz Circumference: 20 in Shaft: 13 in Product measurements were taken using size 12, width D - Medium. Please note that measurements may vary by size.