With 20 to 30 mmHg of graduated compression, and mesh zones for moisture management, SmartWool's Compression Calf Sleeves are highly-engineered to help improve overall recovery. Soft merino wool regulates temperature, does not itch, and is naturally odor resistant. 20-30 mmHg graduated compression rating. 1x1 ribbed leg. Mesh ventilation zones for temperature and moisture management.