Indelible: (adj) that cannot be removed, washed away, or erased.
Get a Books Are Indelible Cap with intricate embroidery detail and a washed out vintage feel.
• 100% cotton twill • 6-panel unstructured cap with a low profile • 6 sewn eyelets • Black sweatband • Metal snap buckle with an antique brass finish • Washed-out vintage effect • Blank product sourced from China