LightWool 140 undershirt long sleeve M'sLightWool undershirt is a long sleeved wool sweater with a round neck. Works well under a second garment on colder days or on its own when it's warm and comfortable. A garment for high intensity activities and training. Care Wash at 40 degrees wool programme Use wool detergent Don't tumble dry. Dry flat Fiber 17. 5 microns Fit Slime Layers Underwear Material 100% Wool (merino)