ENGEL® long sleeve thermal undershirt, 56% Polyamide / 40% Merino Wool / 4% Elastane, 315 g/m². Made of stretchy and soft seamless fabric that adapts to the shape of your body for greater comfort. The fabric contains Merino Wool which gives it a high insulating capacity, which makes this sweater particularly useful in cold climates. High degree of breathability and sweat absorption.