These compression calf sleeves utilize C3fit technology. They are versatile and suitable for various situations, from sports to daily activities like standing work or long periods of travel. 【Compression Series with Compression Design】 Calf Sleeves The compression design provides a secure fit while minimizing tightness, ensuring comfort even during extended wear. Furthermore, the seamless construction and overlap bonding, which minimizes seams, enhance the wearing comfort. By reducing unnecessary muscle and fat movement, it improves exercise efficiency, making it useful for sports such as running, trekking, and golf. Brand: Goldwin Product Name: Fusion Calf Sleeves Color: Black Material: Main Body 　　　　Nylon 74%, Polyurethane 26% Upper Opening 　　　　Polyester 55%, Polyurethane 8% Made in Japan ※ Colors may vary slightly from the actual product depending on the photography.