The KONG Cozie Ultra uses KONG Ultra-Tex fabric construction, which combines ultra-durable technology that uniquely supports action-packed fun. The ripstop material and reinforced seams are supported with a robust interior liner and is designed to fulfill a dogs natural hunting and chewing instincts. Multiple reinforcements, including five times more stitching, add strength and durability ensuring that long-lasting fun is supported. Add to that internal squeakers and dense levels of stuffing and this toy is sure to keep playtime going and going and going. Ultra-Durable KONG Ultra-Tex fabric for action-packed fun Ripstop material and reinforced seams for long-lasting play Robust liner stands-up to instinctual chewing instincts Constructed with five times more stitching Two squeakers entice play