Is it really worth paying a premium for high-end cycling jerseys made from supposedly breathable and moisture-wicking fabrics, or are these just marketing gimmicks designed to part cyclists from their hard-earned cash, and are the differences between these expensive fabrics and more affordable alternatives actually noticeable in real-world riding conditions, or is it just a case of cyclists being led astray by clever marketing and a desire to keep up with the latest trends and must-have kit.