Good ventilation, style & function
Excellent product - well made. I wear US shoe-size 10 or 10.5. From previous comments I went with size S/M and it turned out a perfect fit. During training rides above 80 F, these socks ventilate the mid-sole region. Previously I was wearing thin running socks from Nike, etc. where heat build-up was a problem. Castelli products have good form and style designed for cycling. So far I have two pairs of these and wear a Castelli fingerless glove with minimal padding - so far I'm getting great results.