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 and acts as a second skin, base layers provide an excellent layer of warmth while absorbing and evaporating sweat to keep the wearer fresh and not clammy. This superior IvanhoeUnderwool Felix base layer is manufactured using a 100% extra fine Merino wool with a micron count of 18.5 and is 100% mulesing-free. The cut and 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.