Exercise pen sun screen blocks 80% of sun rays & keeps your dog cool & comfortable while using the exercise pen outdoors.Dog pen sun screen is UV resistant & extremely breathable promoting y airflow through the dog kennel.Exercise pen sun screen measures approximately 4 x 4 feet (48 x 48 inches) | Sun screen fits all MidWest models & other metal exercise pen brands.Sun screen inludes plastic zip ties & grometts for a attachment to the dog pen w/ no tools required for assembly | For proper attachment exercise pen must be in a square configuration & we recommend using ground stakes for sturdy assembly Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.