From Athleta website: Product Details FOR: School, practice, and play FEEL: Powervita fabric is buttery soft with support that feels like a gentle hug FAVE: Novelty back details add a fun twist #820544 fabric + care 75% Nylon/25% Lycra® WICKING: Pulls sweat away from the body to the surface of the fabric so it can evaporate QUICK-DRYING: Dries in a flash for ultimate comfort when breaking a sweat BREATHABLE: Airflow moves easily through the garment RATED UPF 40+ (Excellent Protection) COMPRESSION: Keeps you held in and supported in all the right places FAIR TRADE: Made in a Fair Trade Certified™ Factory Machine wash and dry. Imported.