Jobst for Men extra firm 30-40 mmHg Casual knee high support socks are available in black, khaki, or navy and are sold per pair. They feature: 

Dri-Release Microblend Performance Fabric — comfortable cotton-feel with superior moisture wicking properties to help keep feet dry and cool

Casual Style Design — Contemporary, relaxed design that delivers gradient compression therapy, yet can be worn every day

Durable Heel and Toe — Reinforced heel resists shoe abrasion and strong yarns resist wear and tear

All-Day Comfort Knee Band — Keeps socks up without binding or pinching

Full Medical Compression Ranges — Available in 15-20mmHg, 20-30mmHg and 30-40mmHg
 
Extended sizes — Available in large tall, large full calf and x-large full calf sizes

Anti-microbial/Anti-fungal finish — Promotes healthy footcare and prevents odor