Viagrow 100 ft. Highly Reflective Mylar, Light Diffusing Film with White Plastic Vapor Barrier

Mylar is a reflective wall covering used in greenhouses and grow rooms to direct unused light back to the growing space. Mylar is an inexpensive way to boost the efficiency of costly grow light systems. The 2 mil grade is the most durable available and can easily be mounted with tape. Comes in 4 ft. wide rolls.