Belstaff Ratio Black Gilet Thin Jacket. Experience the ultimate in versatility and style with the Belstaff Black Jacket. This jacket offers a fashion-forward design, allowing you to effortlessly transition from a casual day look to a chic evening ensemble. Stay cozy and look amazing with this must-have jacket!. Thin Jacket, Material: 91% Polyester, 9% Elastane. Branded Badge On Left Chest, Lightweight. 2 Large pocket Zip Closure, Zip Closure, Black Gilet. Style: Ratio Gilet Black