This Under Armour HeatGear® Long Sleeve is designed for immediate use. Simply put it on as your first layer before any activity. It pairs seamlessly with a wide range of athletic wear, such as jogging bottoms, compression shorts, or tights, creating a complete sporty look. Its thin profile also makes it an ideal base layer to wear under uniforms, jackets, or other performance apparel without adding bulk. For proper care and to maintain the garment's performance features: - Washing: Machine wash cold with like colors. Using cold water helps preserve the fabric's integrity and color. - Drying: Tumble dry low. For best results and to extend the life of the garment, consider air drying by laying it flat or hanging it. - Avoid: Do not use bleach, fabric softeners, iron, or dry clean. Bleach can damage the fabric's fibers, fabric softeners can impede the wicking properties, ironing can melt synthetic fibers, and dry cleaning chemicals can degrade the material.