WASHING INSTRUCTIONS: We recommend hand washing in cold water with mild soap for the NOSIDAK Copper Ankle Compression Socks. Rinse thoroughly. Washing time should be no longer than 20 mins. Avoid bleaching and ironing, air dry at room temperature. Pay attention to the sun, and avoid exposure. Do not machine wash dry. SIZE GUIDE: We recommend you check the size before ordering. Please measure your heel circumference around your ankle, and refer to our sizing chart: Small (9"-11.5", 22.86-29.20cm); Medium (11.5"-14", 29.21-35.55cm); Large (14"-16.5", 35.56-41.90cm); X-Large (16.5"- 18", 41.91-45.70cm). We suggest a smaller size if you want more compression. ENHANCE YOUR PERFORMANCE: Useful for Crossfit, Basketball, Tennis, Volleyball, Baseball, Jogging, Walking, Hiking, Wrestling, Skiing, Soccer, Gym Workout, Golf, Climbing, Running, Marathon, Weightlifting, Cycling, Football, Gymnastics, Yoga, Dance, Boxing, Cheerleading, Tumbling, Martial Arts, and Other Sports. NOSIDAK Copper Ankle Support Compression Socks provide all day and night comfort, prevent potential sports injuries, and keep your performance excellent. FULL PROTECTION: Copper Ankle Support Brace manufactured with 3D knitted technology with a good fit for ankle, heel, and arch curves. Excellent sweat absorption, soft and enduring. 360-degree perfect fitting of your feet, keep your ankle, arch, and heel compressed and comfortable all day and all night. NOSIDAK Copper Ankle Compression Sleeve with Arch Support work well for both Women & Men. GRADUATED COMPRESSION: 20-30mmHg Graduated Compression Copper Ankle Brace with Arch Support can significantly effectively relieve Plantar Fasciitis, Achilles Tendonitis, Neuropathy, Heel Spur, Flat/High/Fallen Arches, Arthritis, Bursitis, Soreness, Swelling, Strains, Sprains, Ligament Damage, Inflammation, Joint Pain, Muscle Fatigue, and other chronic or acute Ankle Injury Symptoms. The NOSIDAK Copper Ankle Compression Sleeve is also a good choice after surgery and promotes recovery. ULTIMATE COPPER IONS INFUSED TECHNOLOGY: Real 60% Copper Ions Infused Fiber + 20% Nylon + 12% Polyester + 5% Spandex. Ultimate Copper Ions Infused fabric is comfortable, breathable, and high-elastic. The Copper Ankle Compression Sleeves keep your foot warm, help increase blood circulation, and relieve fatigue, soreness, swelling, and inflammation. NOSIDAK is the BEST choice for Real Copper content products.