Filson Men's Chambray S/S Shirt is a deceptively rugged and light enough for warm weather, this shirt will be a go-to favorite. It’s made with midweight chambray cotton, a fabric renowned for its durability in work shirts. This warp-faced fabric is related to denim, in that different-colored warp and weft yarns are used in weaving. Chambray differs from denim in that it is a symmetrical plainweave, versus denim’s twill weave. The back shoulders feature dual knife pleats for ease of motion. Button-secure chest pockets, with a pencil slot sewn into the left pocket.