2.25 times warmer than regular HEATTECH. The brushed inner side makes it perfect for cold weather. Now in plastic-free packaging. - Uses HEATTECH with bio-warming, insulating, and moisture retaining features. - Material that is stretchy and great at maintaining its original shape. - With brushed lining material, it is about 2.25 times warmer than normal HEATTECH. - Warm and long enough to cover your tummy and waist while fitting comfortably to your feet. - The item is perfect for cold weather due to its high heat retention properties.