Smartwool Compression Run - Knee Socks Size:M Probiotic BC30: 1 billion active

Probiotic BC30: 1 billion active cultures per serving

Just toss it in a bottle or hydration pack

iWick fibers wick moisture to keep feet cool and dry

and non-toxic

Smartwool Compression Run - Knee Socks Size:M Probiotic BC30: 1 billion activeBig Sky Run Co Description More comfort = more miles. The Run Targeted Cushion Compression Over the Calf Socks deliver a seamless balance of cushion and compression to help your feet carry you through longer distance runs. With 20 30 mmHg of graduated compression, durability zones, and a breathable mesh patterning in the leg of the sock, these comfortable, capable run socks are ready to help you go even farther. **size chart in photos** Specs Sock