Thin Air Socks - No Show - TA4 - OS1st Sale Apparel while reflective details enhance visibility

while reflective details enhance visibility in low-light conditions

the KS7 delivers medical-grade compression in strategic zones to help support the knee

Feetures socks are engineered for performance

Updated with a higher stack of Fresh Foam X cushioning

Available in a range of cushioning levels and heights

Thin Air Socks - No Show - TA4 - OS1st Sale Apparel while reflective details enhance visibilityThe OS1st TA4 Thin Air Performance No Show Sock is engineered for runners and athletes who prefer a lightweight, barely there feel without sacrificing comfort or performance. As one of the thinnest socks in the OS1st lineup, the TA4 combines a minimalist design with targeted support, making it ideal for training, racing, and everyday active wear.