These wide-opening waterproof duffel bags are constructed of PVC fabric and close with a TiZip™ waterproof zipper. They secure easily to frames and kayaks with four tie down points. DimensionsBlue Medium Frodo Bag - 29" x 20" x 11" (3,800 cu. in.) Green Large Frodo Bag - 35" x 22" x 12" (6,350 cu. in.)