HAPPY SOCKS COLLAB 86% Organic Cotton Blend, 10% Recycled Polyamide, 2% Polyamide, 2% Elastane Mesh upper for ultimate airflow. Exclusive Easy-Fit cuff never falls down. Arch support so they stay put on your foot. Double-stitched nylon heel & toe for durability and longevity. Unique Stretch-to-Fit sizing system for a perfect fit on a wide range of foot sizes. Ultra-wicking acrylic base with superior softness and stretch to eliminate hot spots and blisters