Optimal Heat Retention: The Heatguard Thermal Long Sleeve T-Shirt features a soft knit fabric that expertly traps body heat, ensuring you stay warm and comfortable in colder temperatures. This advanced insulation makes it an essential piece for winter wear, whether worn on its own or layered under heavier clothing. Durable and Soft Fabric Blend: Made from a durable blend of 53% polyester and 47% cotton, this t-shirt combines the strength and longevity of polyester with the softness and breathability of cotton. The result is a comfortable, long-lasting garment that maintains its shape and feel even after multiple washes. Versatile Fit and Sizing: Available in a comprehensive size range from M (37/40) to 4XL (55/59), this thermal long sleeve t-shirt is designed to provide a comfortable, tailored fit for various body types. The approximately 31-inch length ensures ample coverage, making it a practical and flattering choice for everyone. Easy Care and Maintenance: The Heatguard Thermal Long Sleeve T-Shirt is fully machine washable, making it easy to care for and maintain. Its fabric blend is designed to withstand frequent washing while retaining its softness, shape, and insulating properties, ensuring it remains a staple in your wardrobe for seasons to come. Chums Men's Heatguard Polyester Cotton Blend Thermal Long Sleeve T-Shirt in White Size: Large