To start with, I threw away ALL my cotton socks years ago . I learned my lesson with sweat stink and rot. Lol. Now for hot weather I wear polyester or poly nylon acrylic blend. I wear wool in the winter . I'm hearing of some folks wearing wool socks in hot weather. Is this tolerable only? Is there an actual advantage to this? Has anyone here ever tested this or have any experience with wool in hot weather? Now I'm talking lace up boots, not sneakers.