SIZE: Small fit Women shoe size 4-6.5; Medium fit Men shoe size 6-8.5, Women fit shoe size 7-9.5; Large fit Men shoe size 9-11.5, Women fit shoe size 10-12.5; X-Large fit Men shoe size 12-14.5.ZEALWOOD Merino Wool Casual Athletic Socks are not too thick or too thin, warm in winter and cool in summer. | SWEAT MANAGEMENT: Moisture Control, Breathable Mesh, Blister Control, Soft Blend, Premium Endurance, Smooth Seam. Say goodbye to blisters and chafing. Our Merino Wool Athletic socks are made with ventilation zones. Structurally modified fibers keeps your feet dry and cool to prevent blisters, abrasions and hot spots. | USE IN SUMMER AND WINTER: Discover why wool is the best material for running socks. No matter the time of the year, use the No-Show Pure Athlete Wool Running Socks for superior performance. The thermal regulating properties of wool keep your feet at the perfect temperature – whether using as a cold weather sock or summer running socks. | SPORTS &CASUAL WEAR- ZEALWOOD MERINO WOOL SOCKS professionally customized for Running and other all sports, mountain climbing, football, hiking, running, tennis, marathon, hockey, soccer, basketball, golf, cycling, etc. Various colors, no show ankle and crew length, simple style socks also fit any everyday dressing for adults and teenagers. | SATISFACTION GUARANTEE: We hope you will love the merino wool socks as much as we do! If you're not satisfied with our low cut ankle athletic socks, just return it within 30 days for a full refund. It’s a completely risk-free purchase!