The navy one is regular Heattech. I think the gray one was extra warm. This one has some pilling in places. For those who understand that this is a used item that a child has worn. 【Comfortable Wear】 Made with HEATTECH material, it has excellent heat retention. It's an undershirt that allows you to spend the cold season comfortably. 【Versatile Design】 With a simple design, it's suitable for everyday wear and sports. It's also perfect for layering. 【Size and Fit】 Size 140, providing a perfect fit for growing children. - Color: Olive - Color: Black - Brand: HEATTECH - Size: 140 - Material: Polyester Thank you for viewing.