evo.com | Pearl Izumi Socks > The Pearl Izumi Merino Thermal Bike Socks are built a bit thicker than your average bike sock for added warmth and durability, but retain the same performance fit in your cleats thanks to the arch compression and flat seams over the toes. Plus they're made of a special merino wool blend, so you know they're going to be comfy and dry all day long. Double Weight Knit for Extra Warmth Flat Toe Seam Construction Anatomic Arch Compression for Performance Fit 18.5-micron Fine Merino Wool / Repreve(R) Recycled Polyester | Pearl Izumi Thermal Bike Socks 2022 - Small in Black | Wool/Polyester/Micron