Exercise Pens are good playing ground for your Pets whether indoors or outdoors. One of the best exercise pens is the Golden Zinc Exercise Pen. This exercise pen is made of Acri -Lock™ Acrylic Coated Gold Zinc for long lasting protection. It has a secure double latch door access to make your pet secure. Also, this exercise pen is easy to set up and you don't need tools to build this one. It's a versatile exercise pen; you can even have a variety of pets in it.