Woolpower Crewneck 200Classic Merino Base Layer The long sleeve wool Crewneck 200 is great for keeping the bodys core temperature regulated in cool to cold climates. This Merino wool base layer shirt made from Woolpowers superior Ullfrott Original 200 g m terry loop design features no lengthwise seams, minimizing chafing and rubbing during peak physical activity. Ullfrott Original wool fabric with smooth, soft terry loops facing the inside and flat synthetic fibers lining