DeFeet always makes great stuff. This particular variety is very lightweight, and good for hot days. I've done a few 30-40 mile rides in them and they're cool and comfy. Size 44 shoe and a large fits well.
Good pair of socks. Fabric seems sturdy (but I have worn only a few times). Fit is good. Colorado are nice - needed an orangeblack to go with a jersey. Only worn in cool temperatures so far, so don't know how they will feel on a hot summer day, which is often a distinguishing feature for other socks I have had.
These are fun socks that will get a second look as you wiz by. The mediums were too big for size 7 feet. I do wish they came in small. The mediums will fit size 8 feet quite well.