Mons Royale Men's Olympus 3.0 Long-Sleeve - Merino wool The slim fit 250 merino wool long-sleeve shirt will keep you warm, while breathable mesh panels prevent you over heating. Features Mons 250 merino wool, our warmest baselayer weight Slim fit and raglan sleeves for ease of movement Merino mesh underarm panels   Thumb loops to lock out the cold Materials 97% merino wool 3% elastane What's sustainable? ZQ Certificate   Non-mulesing Merino wool ZQ is a hallmark that certifies a farmer is meeting the highest standards in the areas of animal welfare, environmental care, and social sustainability - e.g. traceable, No mulesing, Hand selected Environmentally friendly dyes and water processing & fair manufacturing process -   read more