Carhartt Dark Navy Blue Acrylic Knit Watch Hat A18 Unisex Brand New without Tag, in Excellent Condition. Carhartt A18 NVY Navy Acrylic Watch Hat in your pocket when you aren't using it. You'll hardly even notice its weight on your head when you're wearing it. This watch cap is tiny, but it's a powerful weapon against winter. The warm material and tough design prevent heat from escaping through the top of your head to keep you warm. The navy cap is made with 100% acrylic fabric. The material dries quickly, washes easily in the machine and stands up to tough wear and tear. Acrylic retains dye well, too, so the navy color will stay vibrant even after repeated washings. Made with rib-knit construction, this watch cap fits close and snug against your head with stretchy comfort. The stretchable design is one-size-fits-all, and made to go on many different heads. Rib-knit construction is tough against wear, and tightly woven to prevent cold wind from sneaking through.