Official National Basketball Association Fan Shop Authentic NBA 2-pack Large (10/13) Team Socks (Boston Celtics) AUTHENTICITY: Official National Basketball Association Merchandise STYLE: Anatomically formed design for form-fitting comfort QUALITY: Two-tone socks utilize the TECHNIFIT moisture management system that reduces sweat and irritation Size: Large (10 - 13) 2-Pack Set MATERIAL: Made of 83% Acrylic, 14% Polyester, 2% Latex Rubber and 1% Spandex