Pros:
- Completely cover the calf
- Stay up throughout the day (13+ hours of wear)
- Reasonably durable, no quality issues observed

Cons:
- The material is not thick, probably only slightly thicker than a dress sock; so I wear an ankle sock underneath, for comfort

Overall: For the price, these socks are a great buy. If you need thicker for comfort/durability, just wear athletic ankle socks underneath. For reference, I have thin ankles and a calf circumference of 16.5".