Under Armour Base 2.0 Compression Socks (1-Pack), Black/Taxi, Large 52% Polyamide Nylon/23% Polypro/23% Acrylic/2% Elastine Imported Signature Moisture Transport - Wicks moisture and accelerates evaporation ArmourBlock - Antimicrobial finish prevents growth of odor-causing bacteria Embedded Arch Support - Reduces foot fatigue Strategic cushioning - Protects high-impact areas of feet during heel-strike and toe-off Lightweight stretchy nylon blend construction with compressive support increases circulation and reduces recovery time