Neptune Jr.-Sweet dreams of the rolling sea can only be made by the God who controls it and wearing out your pooch from hours of play time helps too. Mighty dog toys rethink durability and approach it from a new angle. Durability is created for each toy with multiple layers of flexible materials that move with the dogs teeth instead of tearing. Compared to other toys, Mighty Dog Toys have no hard edges. The result is that these toys do not promote chewing - great when you're trying to discourage chewing habits. Each toy has a plush outer material with a layer of heavy fleece underneath. The fleece underneath is what gives this toy its strength. The fleece core holds the body of the toy together when playing games like tug. All seams are located inside the toy to discourage chewing. Vulnerable seams are protected by sewing a flexible material over the edge of the seam. Vulnerable areas are covered and sewn with a material binding that covers the original sewn edge. This extra binding creates multiple rows of stitching to hold the seams together. These toys are machine washable (air dry) and float. 7 out of 10 on the Dura Scale.