The OS1st TS5 Travel Socks help to improve circulation while providing you with medically correct graduated compression for the prevention of venous issues related to long term sitting. They are FDA Registered and feature 5 Zones of Compression Technology. Add that to their ultra-soft, yet durable microfiber that won't bind, bunch, or pinch you and you've got your new favorite socks to wear anywhere, anytime. With a seamless, silver ion odor treatment, they might just be the most perfect sock ever made.