In the first of our sports bag trends, we highlight the drawstring duffel as a key shape for spring/summer 2012. True sports variaties feature elongated upright bodies and a single shoulder strap, while treated cotton, nylon and perforated leather are the important materials. Consider adding zips, clip buckles, rope straps and plastic inserts for extra sportif details. Fashion derivitives are shorter in the body, with shoulder straps and top handles.