I have only recently discovered Simply Merino and I am SO GLAD that I have! This top is by far the best quality merino base layer I have found, the fabric is so soft and supple. I wore it for a week straight, and promptly ordered another one. I love the generous length in both the body and the sleeves, making for easy layering and warmth. I often fall between sizes in most brands — for reference, I am 34"/29"/38". I went with a medium because I prefer my clothes to have some breathing room, and I'm glad I did, the fit is exactly what I wanted and so incredibly comfortable. Also, the colours are VERY beautiful in person, I wasn't completely sure about ordering the mustard but it is a gorgeous, earthy gold, I love it!