The macpac Women's 150 Merino Long Sleeve V-Neck Top is made from ultralight merino wool for everyday comfort - making it the perfect soft merino baselayer. Providing natural softness, temperature regulation and odour resistance, merino wool is one of natures finest fibres. Working to keep you cool in the heat and warm when its cold, merino wool is highly breathable absorbing large quantities of moisture vapour before allowing it to evaporate into the air so you stay comfortable for longer. Grown on the backs of merino sheep, merino wool is a naturally renewable and biodegradable fibre, perfect for casual wear or taking travelling.