Designed with plane or car travel in mind but useful for anyone sitting for long periods of time. The 5 zones of medical grade compression range from light (10-15 mmHg) to moderate (15-20 mmHg) to improve circulation and prevent discomfort during extended immobility. For the best fit, it is important that you use the size chart before ordering. Targeted conditions: Circulation, Deep Vein Thrombosis, leg cramps and fatigue, achy legs and feet Medical grade compression made on FDA registered machinery Included in all Socks with Purpose® Micro-nylon treated with silver-ion technology to keep dry and prevent odor Seamless construction and left/right design for 360-degree blister protection Y-Gore heel to prevent the sock from slipping down into your shoe Care Instructions: Hand wash with mild soap and air dry. No bleach or fabric softener. Before ordering, use this size chart for accurate fit. Size Ankle Circumference Calf Circumference S 7-8.25 in 18-21 cm 11-15 in 28-38 cm M 8.25-10 in 21-25 cm 12-16.5 in 30-42 cm L 10-11.5 in 25-29 cm 12.5-16.5 in 32-46 cm XL 11.5-13 in 29-33 cm 13-19 in 34-49 cm Size Average Shoe Size S US: M 4-6 US: W 4-6.5 UK: 2-4 EU: 34.5-37.5 M US: M 6.5-9.5 US: W 7-10 UK: 5-8.5 EU: 38.5-43 L US: M 10-12.5 US: W 10.5+ UK: 9.5-12 EU: 43-47.5 XL US: M 13+ UK: 12.5+ EU: 48+
