The Castelli Rosso Corsa 9 is just like the Rosso Corsa 13 and 6, but with a medium-height 9cm cuff. Identical to the other versions, they are woven with Meryl Skinlife antibacterial fibers. The sock is thus wicking, will feel dry pretty much in just about every circumstance save a rainstorm. The top of the foot is a diaphanous web, ultra-thin and extremely breathable. In the middle of the foot, the arch area, there is a high-density band woven in. You won't notice any difference in thickness, but you will feel like the sock is becoming one with your foot rather than sliding around between your foot and your shoe. The toe has a flat seam for comfort and the cuff at the top is folded over to keep the sock from slipping.
The Castelli Rosso Corsa 9 Sock comes in three colors: Black, Red, and White. The toes, heels, mid-foot band, and cuff logos are in contrasting colors. Sizes are S/M, L/XL, and 2XL.
This sock is great if you like an ultra thin sock that holds up very well. Compared to a Defeet sock, I'd say this one is definately thinner but is holding up just as well. I worn my one pair of these for a few rides and I'm close to saying they are my favorite pair of summer socks. Definitely worth the extra bucks (as is pretty much everything made by Castelli).
These socks are great in every aspect. They fit excellent, keep the feet cool, wick away the sweat and are made excellent from a quality standpoint. The socks are a nice height and look fantastic. I went back and bought several more pairs after receiving my initial order, double thumbs up. I bought the l/xl and wear a size 10 street shoe.
Yes these have to be my favorite summer socks. Have 5 pair of these and the fit is superb, lightweight + thin, fit into my road shoes perfectly, no uncomfortable folds, bunching or pulling. Super comfort on long hot summer rides 4-5-6 hrs, no problem. (the fit for me on this product is XXL to fit US size12)
These socks are by far the best on the market. I am prone to "hot" feet in the summer and I must say these socks provide great comfort and cooling. As with all Castelli products they are top quality.
Yes you can find cheaper socks and all, but these really feel good and keep their shape. I expect them to last a long time.
Thin. Breathable. Comfortable. Nice design. No complaints.