Our sturdy KLUE socks will become your favorite everyday socks because we have developed the best combination of durability, comfort and sustainability. Sustainability: Our socks are ethically made from 80% organic cotton from the Aegean Sea, which is known for its strong and smooth fibers offering great durability. Their vibrant colors will last for years thanks to our OEKO Tex Standard 100 certified manufacturing partners. Comfort: organic cotton from the Aegean Sea is one of the strongest and softest cottons in the world. The elastic at the ankle is tight enough to stay in place but light enough not to leave marks.