66% Polypropylene, 25% Polyester, 7% Rubber, 2% Spandex Imported PRO LINE BASEBALL AND SOFTBALL SOCKS: These solid multi-sport over the calf socks are an ideal weight and length for baseball, softball, and football. ACCURATE SIZING: MadSportsStuff Sock Size: Small - Youth Shoe Size 12-5, Medium - Womens Shoe Size 5-10 Mens Shoe Size 5-9, Large - Womens Shoe Size 10-13 Mens Shoe Size 9-12, X-Large Womens Shoe Size 13+ Mens Shoe Size 12+ BELT SIZING: Youth belt is 1.25 inches wide and fits a waist size of 18-32 inches. The adult belt is 1.5 inches wide and fits a waist size of 30-46 inches. PERFORMANCE MATERIALS: Fiber Contents: 66% Polypropylene, 25% Polyester, 7% Rubber, 2% Spandex QUALITY YOU CAN TRUST: MadSportsStuff is the official sock and stirrup partner for Babe Ruth Baseball and Babe Ruth Softball. These high performance, moisture wicking, multi-sport over the calf socks are an ideal weight and length for baseball, softball, and football. MadSportsStuff baseball belts or softball belts are made for performance by combining elastic webbing with poyurethane and genuine leather. Our belts have a slide adjuster and belt holes, making it very easy to adjust. Small socks come with Youth size Belt and all others come an Adult size Belt.