The TRIXIE Dog Agility Tunnel is a fun, healthy, and challenging activity. In the sport of agility, this type of tunnel is called an open tunnel. Dogs enter the tunnel through a 23-in round stable opening before running through the durable, structured polyester 16.5-ft tunnel. The obstacle can be easily set up indoors or outdoors and includes fillable stabilizing saddlebags to secure the tunnel in place. When not in use, it is fully collapsible for easy storage in our zippered nylon bag. The open tunnel is also easy to clean - simply wipe it down with a damp cloth. An instructional booklet is included, sharing tips for designing the perfect fitness and training program. Suitable for intermediate and advanced levels and larger breed dogs.