AC4 Active Comfort Quarter Sock

For daily miles, long hikes, and humid days on your feet, the AC4 is our go-to quarter sock for athletes who want a clean, locked-in fit. The Active Comfort design supports your foot inside the shoe, while the snug fit limits bunching and slipping on long days.

• Active Comfort design supports your foot inside the shoe so it stays planted from the first mile to the last
• Snug, stay-put fit helps limit bunching and slipping, even on long days and rough terrain
• Quarter-height cut sits just above the shoe collar, so it works with trail runners, road shoes, and low hikers
• Handles running, hiking, hunting, and everyday wear, from humid summer miles to cooler mornings
• Made by OS1st, a brand focused on foot health and performance socks. Available in Black and Charcoal, sizes Small, Large, and XL