HEATTECH in dark gray, size M, with 100% cotton on the skin-facing side. - Brand: HEATTECH - Color: Dark Gray - Size: M - Material: 53% Cotton, 35% Acrylic, 7% Polyester, 5% Polyurethane I'm selling this because I haven't used it, as I already have enough. Please understand that this item has been stored at home. Thank you to those who are not overly concerned about minor details.