Woolen underwear? Are we back in the Victorian era? Surely that'll be itchy and scratchy? At Spring Chicken we researched the properties of merino wool and we had to think again. Merino wool has fine fibres, so it's soft and gentle on your skin. It's naturally breathable and elasticated, and it has temperature control properties. Merino wool reacts to your body temperature to cool you down or warm you up, so it keeps you comfortable in all weathers.