ChezMax Leg Compression Socks for Running, Cycling, Nurses-one pair 1. BREATHABLE MATERIAL: Graduated compression at 15~20 mmHg for casual wear. Breathable knitting method allows a comfortable wearing experience throughout the day. 2. RECOMMENDATION FOR SIZE: Our wide 1.2 inch anti slip strap ensures the leg compression sleeves fit just right and do not slip down your leg whilst running or playing. Available in 3 sizes: M fits leg top circumference from 12"-14", bottom circumference from 7"-11". L fits leg top circumference from 13"-17", bottom circumference from 8"-12". XL fits leg top circumference from 15"-19", bottom circumference from 9"-13". Please use the above guide to determine your size. 3. PROTECTION SUPPORT: Graduated compression optimizes blood circulation and stabilizes calf muscles to enhance performance and reduce muscle swelling / fatigue. Ideal calf muscle protection and performance enhancement for cycling, running, marathon, strength training, and various sporting events. 4. SUITS VARIOUS SPORTS & FITNESS ACTIVITIES: A must have for running, cycling, basketball, baseball, volleyball, martial arts, cross fit, training and work outs or any fitness activities. These are perfect for low or high impact exercises enabling you to warm up safely & recover quickly. These also make a great gift. 5. PRODUCT INFORMATION: One pair of sleeves included per package. Material: Nylon. Length: M-20.1",L-20.5", XL-21". Weight: 4.0 oz.