The Peterbilt 387, 587 ZenEclipse Tan Door Window Cover Set is a practical and efficient solution for insulating your truck's windows. Made in the USA, this set includes covers for both the driver and passenger windows, featuring 7 quilted layers, an aluminum radiant heat barrier, 1/4 inch foam, and 3 layers of polyester for maximum insulation. With suction cups for easy installation, this set fits most Peterbilt 387/587 models and can be installed in seconds. Keep your truck comfortable and energy-efficient with this high-quality window cover set.