Diesel Shirts Diesel Men Shirt Nabil Poshmark Products FSG Diesel Black S Simply A Shirt Diesel Diesel Shirts Diesel Men Dnabilfsg Bowling Shirt Poshmark. Diesel's D Nabil FSG cotton Shirt is a contemporary and versatile style piece. Featuring short sleeves and a Cuban style collar, it offers a cool, casual look. The snap button front closure adds a touch of practicality, while the iconic Oval D logo on the front highlights its authenticity. The distressed Tencel denim design gives the shirt a worn in look and a soft effect, combining comfort and style.