General Cage It'z A Breeze Exercise Pens 4 x 4 Foot It'z A Breeze Too Soft-Sided Exercise Pens are Ideal for Travel Finally, an exercise pen designed for traveling pet professionals and pet owners! These soft-sided Exercise Pens designed by General Cage feature lightweight panels made of water-resistant Olive Brown nylon canvas and Tan woven nylon mesh supported by a durable, tubular aluminum frame. Allows maximum ventilation and visibility, yet is more easily portable than conventional wire pens. Pen consists of eight panels that fold down in seconds for easy transport and storage. Features an easy-access door with three Velcro® strap closures. Can be configured into a 2' x 6' rectangle, a 4' x 4' square, or a 4 3/4"L x 4 3/4"W octagon shape. Includes ground stakes. Has 8x2' panels.