Heatwave women's thermal long sleeve top pack of 2 base layer discover the warmth and comfort with the heatwave pack of 2 women's thermal long sleeve top. Designed as durable warm underwear baselayers, these tops are perfect for active outdoor activities such as running, hiking, and sports, or even as workwear. These thermal tops stand out in the market due to their cotton-rich composition and innovative insulation technology. Key feature 1: advanced insulating yarn description: the thermal tops are crafted from an advanced insulating yarn that provides high-performance insulation. The soft brushed inner layer ensures maximum warmth by trapping heat close to the skin. Benefits: enjoy consistent warmth without the bulk. This feature ensures you stay cozy in cold weather, making it ideal for various outdoor activities. Key feature 2: comfort fit and ribbed construction description: the ribbed construction of these tops allows them to shape perfectly to the contours of your body. The tops are also designed to be side seam-free, enhancing overall comfort. Benefits: experience a snug, comfortable fit that moves with you, reducing chafing and irritation. Perfect for prolonged wear during active pursuits. Key feature 3: 0.45 Tog rating description: with a 0.45 Tog rating, these thermal tops effectively hold more warm air close to the skin, providing excellent insulation without compromising breathability. Benefits: stay warm without feeling overheated. This feature ensures you m...