- CARHARTT. A18019. ACRYLIC WATCH HAT. BLACK AND WHITE. Born in 1987, the A18 Watch Hat quickly rose as an icon. Originally designed as a workwear essential, it can now be found at construction sites and campgrounds, state fairs and football stadiums. Thick acrylic yarn makes this hat a warm option for the colder months. Soft to the touch, the stretchy rib knit creates a stay-put fit.