Carhartt WIP Watch Hat - Lumber The Acrylic Watch Hat is one of Carhartt WIP’s staple pieces, created in a warm Acrylic fabric with a stretchy rib knit that ensures comfort and a fit suitable for everyone. Features a woven Carhartt WIP label on the front. I020222_1ZD_XX 100% Acrylic, 9 gauge height: 23.5 cm / 9.1 inch stretchable rib-knit fabric square label Carhartt WIP Watch Hat - Lumber