describeHIGH QUALITY AND COMFORT: Made of durable, custom blend fabric for breathability, stretch and longevity. Performance fabric keeps you dry, and moisture-wicking fabric keeps you warm in colder temperatures and cooler in rising temperatures, even during the toughest runs and workouts. Lightweight, flexible, and breathable, allowing for unrestricted movement. They're so comfortable, you'll forget you're wearing them, allowing you to focus better on your daily activitiesUNIQUE DESIGN: 100% Honeycomb Crash Pad*--Conforms to your shin for ultimate flexibility and protection. *Dual Layer Moisture Wicking*--Using state-of-the-art materials to keep muscles warm and dry quickly. *Non-slip inner silicone strip*--Embedded elastic sliding strip, prevents the calf sleeve from loosening during exercise, helps to coordinate muscle ability and protect the skin. *Flatlock Seam Stitching*--Allows flexible movement and reduces chafing or skin irritation.FIT: It is a must-have for any leg-intensive activity such as marathon, walking, jogging, running, hiking, cycling, soccer, rugby, tennis, basketball, triathlon, weightlifting, gym fitness training and general fitness. PRO-GRADE COMPRESSION - Additional calf support/shin support enhances warm-up, reduces fatigue and provides muscle stability. Ideal for extreme races and long runsWe've created a premium calf compression sleeve that's perfect for your everyday needs.Size Description: Please refer to the size chart in the product image for the correct measurement and size, size M is more suitable for children. While some sleeves can be too tight no matter what size you choose, the sleeves are designed to provide a snug fit. Therefore, it may be a little difficult to wear. For best results, hold the sleeve in your hand, pull the pad over your ankle, and spread it over your shin.Size: Size M (leg circumference 31-39cm)