ENGEL® long sleeve thermal undershirt, 60% Polyester / 32% Polyamide / 8% Elastane, 150 g/m². Made of seamless elastic fabric that adapts to the shape of your body and bamboo fibers that make the product particularly useful during heavy physical work, as these fibers have excellent antibacterial and breathable properties, as well as absorb perspiration, drying more quickly and minimizes unpleasant odors, providing greater comfort.