The Sanforized Patch Trucker Hat pays homage to the original Duck Head denim workwear that was vat dyed in indigo and sanforized, meaning pre-shrunk. While everyday styles have changed, Duck Head’s lasting quality remains. 100% Cotton Canvas. Felt Applique Embroidered Logo. Iconic Gold Tab Label on Strap. Antique Brass Adjustable Buckle. Mesh Back.