As well as wanting fabrics that will wick sweat away quickly, you also want fabrics that will dry quickly. Especially if you’ve got periods of intense exercise followed by rests, as the last thing you want is a clammy shirt as you cool down. Synthetic fabrics are great for doing exactly that, but do need a quick wash or they can harbour odours. A better option can be a fine merino wool instead. Wool handles moisture well, and also contains fatty acids that absorb bacteria, meaning your gear stays stink-free.