Anatomical Fit: Promotes natural toe splay; Mesh Top: Maximizes breathability and ventilation; Arch Support: Supportive band ensures a secure, stable fit; Total Foot Utilization: Supports full-foot alignment and engagement; Optimized For: Trail Running & Hiking; Fiber Content: 58% Nylon, 39% COOLMAX EcoMade, 3% Lycra; Care Instructions: To extend the life of your socks, wash on delicate with cold water, followed by line drying