Zensah USA Compression Leg Sleeves - Calf Sleeve for Shin Splints - Great for Running, Basketball, Sports - Patriotic American Flag Design 86% Nylon/14% Spandex Made in US 200 needle count for more durable construction Lightweight & breathable Engineered for improved muscle support and injury prevention Graduated compression for reduced fatigue and faster recovery Moisture wicking and anti-odor proprietary fabric with silver ions moisture wicking and anti-odor proprietary fabric with silver ions moisture wicking and anti-odor proprietary fabric with silver ions. Made of 86% Nylon, 14% spandex