Hummingbird 40 Widemouth Duffle Bag WideMouth Carry-On: Easy-access, conveniently sized protection. Wide-mouth, top-loading design allows for easy access and expandable capacity. Weatherproof roll-top closure system. Super-durable 19-oz. scrim-reinforced vinyl, 30-oz. scrim-reinforced vinyl bottom and RF-welded seams. D-rings plus hand and shoulder straps simplify carrying and securing.