Consists of spandex yarn with four ways stretch advantages. It is lighter in weight with over -lock design. Provides controlled compression without leaving impression on the skin. The Achilles tendon connects calf muscle to heel bone. It may cause due to probated foot, improper foot wear, fatigue and exercise. It is characterized by pain, muscle swelling, fatigue and improper exercise. Flamingo premium elbow support gives you a great relief. Features, provides comfortable back support with flexible flat plastic splint in the middle region, four side splints provided for extra stability. Size chart S-70-80 centimeters/28-32 inches, M-80-90 centimeters/32-36 inches, L-90-110 centimeters/36-44 inches, XL-110-125 centimeters/44-50 inches and measure waist size.