2 LAYERS OF MATERIAL Mighty® Ultimate™ toys are made with UP TO 2 layers. The non woven fleece is not easily puncture by a dogs teeth andmoves with the action of the jaw. This protects the plush from being ripped or torn easily and makes a toy that will last a lifetime. 1 layer soft Plush on the outside. 1 layer soft non woven Fleece on the inside. SEWN MULTIPLE TIMES All of the toy layers are sewn together to make one super strong layer of material. Each toy is sewn together with 2 rows of cross stitching and 2 rows of linear stitching. Some toys have an additional piece of webbing trim which protects the sewing edge and makes the toy even stronger. REMOVE LOOSE THREADS Over time your pet may begin to wear down the different layers of the toy, and may loosen or remove pieces. This is normal. Remove loose threads to avoid ingestion. If your pet reaches the white stuffed core of the toy discard immediately.