Blue Line Quarter Sock

Product Overview

Blue Line Quarter keeps the supportive construction of the First Responders Line in a shorter above-ankle profile. Mesh at the instep adds airflow, while arch compression and cushioned Strike Zones™ support a secure fit. Silver Lined™ fabric brings the manufacturer’s odor-control technology to long shifts and everyday activity.

Features & Details

• First Responders Line, style #3111B.
• Quarter-height coverage ends just above the ankle.
• Built-in arch support and compression for a secure fit.
• Cushioned Strike Zones™ in high-impact areas.
• Thin mesh instep for breathability.
• Black Achilles area keeps the cushioned detail understated inside the shoe.
• Moisture-wicking fabric and Silver Lined™ odor-control technology.
• Designed to help reduce bunching, friction, and slippage.
• Made in the USA of U.S. materials.

Materials & Construction

52% polypropylene, 25% 44T7™ Silver, 10% Spandex Lycra, 8% Sta-Cool, and 5% nylon. The performance yarn blend combines moisture management, stretch, and reinforcement.

Color, Fit & Sizing

Color: Black/gray/white with blue detail. An above-ankle quarter profile with compression arch support. Available sizes: MEDIUM (Men's 4-8, Women's 5-10); LARGE (Men's 9-12, Women's 11+); X-LARGE (Men's 13-15).

Style & Everyday Wear

Pair with duty shoes, trainers, or everyday sneakers. The blue detail gives the compact profile a service-inspired accent without a tall leg.

About Covert Threads

Covert Threads began with a desert boot sock developed with Marine input. The veteran-cofounded brand focuses on climate-specific socks and performance accessories for military duty, outdoor activity, work, and training.

Available at Chill Cap Store

Available through our retail collaboration with Covert Threads, this style adds the brand’s practical, activity-focused approach to the Chill Cap Store accessory selection.