I'm a road cyclist - I ride about 500 miles per month, which means an hour or so most days after work, and several hours on weekends. I work hard climbing hills, sprinting, etc, then I stop about once an hour to eat and stretch. It might be 50 F and partly sunny when I set out, and 30 F by the time I get home ... so if I work up a sweat, it'll chill me to the bone. ( I also do hike-in back country camping, and some kayaking. ) I always wear a merino base layer, and usually a goretex outer layer. Recently I discovered cashmere, as a mid layer, and fell in love. I don't sweat much in it, and when I do, I don't feel it, then it dries quickly. A merino sweat gets drenched with sweat. Polar fleece feels clammy and gross. Cotton kills. Here's where I need advice: cashmere is made out of pure awesome, but does anything else have the same or better magic? I've been told that alpaca, angora, and qiviut ( musk ox down ) are better for my purposes than cashmere. Before I go investing in clothes, is there anything else I should try out first? Thanks!