Part of a collaboration with National Geographic, these adidas socks are a wearable celebration of nature's beauty. On cold trail days, they keep your feet warm with insulating COLD.RDY and a soft polyester-wool blend. The crew-length cut stays right in place from trailhead to mountaintop. Made with a series of recycled materials, and at least 40% recycled content, this product represents just one of our solutions to help end plastic waste.