New Balance Men's 8-Inch Fitted Short 90% Polyester/ 10% Spandex Imported Performance Technology: New Balance Lightning Dry --Lightning Dry is a fabric that keeps you dry and comfortable by managing moisture transfer. The hydrophobic polyester yarns transfer moisture away from the body to keep you dry. Ventilation--Mesh or breathable fabric inserts in high heat zones allow sweat to evaporate and cool air to circulate. Reflectivity--Provides visibility in low-light conditions through the use of reflective fabrics, yarns, tapes, trims, or heat transfers. Fabric Content: 90% polyester, 10% spandex Inseam: 8 Inches