Stasher Smell Proof BackpackStasher Backpack Poly Canvas Smell Proof Double Zipper Inset Mesh Pocket & Front Cargo Pocket Approx measurements: 18" x 17" x 7" NOTE: Were now using new technology to bind the smell proof material to the bag to make it more smell proof. We also have new double zippers with each zipper having reverse direction with a stopper at the end for better trapping of the smell.