The base layer has emerged as a must-have item for the serious golfer in recent times, trapping in heat whilst regulating body temperature. The base layer is the layer closest to the skin & acts as a second skin, base layers provide an excellent layer of warmth while absorbing & evaporating sweat to keep the wearer fresh & not clammy. This superior Ivanhoe Underwool Felix base layer is manufactured using a 100% extra fine Merino wool with a micron count of 18.5 & is 100% mulesing-free. The cut & style is spot on for today's market. The cuffs incorporate a thumb grip which is great for keeping the base layer in place when putting on other layers.