The tire is constructed so hat it can stay outside and will not lose its shape.  The colour is injected into the tire so you never have to use tape on the tire and it will not lose its colour.  the magnet is adjustable so you can set how much force it takes to open the tire. it will not open if your dog simply brushes against it.
 
Frame is constructed with 100% UPVC Piping. 5' height with a 4' width. 
Note the 24" tire does not reset automatically after it is broken.